[PATCH 29/55] Bundle pyiso8601 for iso8601 time/date manipulation.

Jelmer Vernooij jelmer at samba.org
Fri Feb 6 12:04:01 MST 2015


Change-Id: I0f992b949b1717635ff26fa0db6073675cce4ad7
Signed-Off-By: Jelmer Vernooij <jelmer at samba.org>
---
 lib/update-external.sh                        |   5 +
 third_party/pyiso8601/.hgignore               |   8 +
 third_party/pyiso8601/.hgtags                 |   6 +
 third_party/pyiso8601/LICENSE                 |  20 ++
 third_party/pyiso8601/MANIFEST.in             |   2 +
 third_party/pyiso8601/README.rst              | 180 +++++++++++++++++
 third_party/pyiso8601/dev-requirements.txt    |   5 +
 third_party/pyiso8601/docs/Makefile           | 177 +++++++++++++++++
 third_party/pyiso8601/docs/conf.py            | 266 ++++++++++++++++++++++++++
 third_party/pyiso8601/docs/index.rst          |  80 ++++++++
 third_party/pyiso8601/docs/make.bat           | 242 +++++++++++++++++++++++
 third_party/pyiso8601/iso8601/__init__.py     |   1 +
 third_party/pyiso8601/iso8601/iso8601.py      | 214 +++++++++++++++++++++
 third_party/pyiso8601/iso8601/test_iso8601.py |  97 ++++++++++
 third_party/pyiso8601/setup.py                |  25 +++
 third_party/pyiso8601/tox.ini                 |   8 +
 third_party/wscript_build                     |   1 +
 17 files changed, 1337 insertions(+)
 create mode 100644 third_party/pyiso8601/.hgignore
 create mode 100644 third_party/pyiso8601/.hgtags
 create mode 100644 third_party/pyiso8601/LICENSE
 create mode 100644 third_party/pyiso8601/MANIFEST.in
 create mode 100644 third_party/pyiso8601/README.rst
 create mode 100644 third_party/pyiso8601/dev-requirements.txt
 create mode 100644 third_party/pyiso8601/docs/Makefile
 create mode 100644 third_party/pyiso8601/docs/conf.py
 create mode 100644 third_party/pyiso8601/docs/index.rst
 create mode 100644 third_party/pyiso8601/docs/make.bat
 create mode 100644 third_party/pyiso8601/iso8601/__init__.py
 create mode 100644 third_party/pyiso8601/iso8601/iso8601.py
 create mode 100644 third_party/pyiso8601/iso8601/test_iso8601.py
 create mode 100644 third_party/pyiso8601/setup.py
 create mode 100644 third_party/pyiso8601/tox.ini

diff --git a/lib/update-external.sh b/lib/update-external.sh
index d01722e..9b507e2 100755
--- a/lib/update-external.sh
+++ b/lib/update-external.sh
@@ -49,4 +49,9 @@ svn co http://mimeparse.googlecode.com/svn/trunk/ "$WORKDIR/mimeparse"
 rm -rf "$WORKDIR/mimeparse/.svn"
 rsync -avz --delete "$WORKDIR/mimeparse/" "$LIBDIR/mimeparse/"
 
+echo "Updating iso8601..."
+hg clone https://bitbucket.org/micktwomey/pyiso8601 pyiso8601
+rm -rf "$WORKDIR/pyiso8601/.hg"
+rsync -avz --delete "$WORKDIR/pyiso8601/" "$THIRD_PARTY_DIR/pyiso8601/"
+
 rm -rf "$WORKDIR"
diff --git a/third_party/pyiso8601/.hgignore b/third_party/pyiso8601/.hgignore
new file mode 100644
index 0000000..2906798
--- /dev/null
+++ b/third_party/pyiso8601/.hgignore
@@ -0,0 +1,8 @@
+syntax: glob
+build
+dist
+*.pyc
+iso8601.egg-info
+pyiso8601-venv
+.tox
+_build
\ No newline at end of file
diff --git a/third_party/pyiso8601/.hgtags b/third_party/pyiso8601/.hgtags
new file mode 100644
index 0000000..4e2dcb8
--- /dev/null
+++ b/third_party/pyiso8601/.hgtags
@@ -0,0 +1,6 @@
+bd89974951dae66bdb1c441d2e931f6b27fe1097 0.1.5
+462f8303fc3995150c188d3708fb6981d7705453 0.1.6
+1881bf20e595e5b923f5c8b1f859dc310e5f22c2 0.1.7
+01161826be6e8a99cde813850f0d6ed7952ff377 0.1.8
+4b511368cef17b3648af3bc16d2421ce8fbe4dc8 0.1.9
+0f02cc55100a1bad23c0ea0bd0f07b8de0e3e3f0 0.1.10
diff --git a/third_party/pyiso8601/LICENSE b/third_party/pyiso8601/LICENSE
new file mode 100644
index 0000000..37bbd6c
--- /dev/null
+++ b/third_party/pyiso8601/LICENSE
@@ -0,0 +1,20 @@
+Copyright (c) 2007 - 2014 Michael Twomey
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/third_party/pyiso8601/MANIFEST.in b/third_party/pyiso8601/MANIFEST.in
new file mode 100644
index 0000000..ea47448
--- /dev/null
+++ b/third_party/pyiso8601/MANIFEST.in
@@ -0,0 +1,2 @@
+recursive-include iso8601 *.py
+include README.rst LICENSE tox.ini setup.py *requirements.txt
\ No newline at end of file
diff --git a/third_party/pyiso8601/README.rst b/third_party/pyiso8601/README.rst
new file mode 100644
index 0000000..6ad8f49
--- /dev/null
+++ b/third_party/pyiso8601/README.rst
@@ -0,0 +1,180 @@
+Simple module to parse ISO 8601 dates
+
+This module parses the most common forms of ISO 8601 date strings (e.g.
+2007-01-14T20:34:22+00:00) into datetime objects.
+
+>>> import iso8601
+>>> iso8601.parse_date("2007-01-25T12:00:00Z")
+datetime.datetime(2007, 1, 25, 12, 0, tzinfo=<iso8601.Utc>)
+>>>
+
+See the LICENSE file for the license this package is released under.
+
+If you want more full featured parsing look at:
+
+- http://labix.org/python-dateutil - python-dateutil
+
+Parsed Formats
+==============
+
+You can parse full date + times, or just the date. In both cases a datetime instance is returned but with missing times defaulting to 0, and missing days / months defaulting to 1.
+
+Dates
+-----
+
+- YYYY-MM-DD
+- YYYYMMDD
+- YYYY-MM (defaults to 1 for the day)
+- YYYY (defaults to 1 for month and day)
+
+Times
+-----
+
+- hh:mm:ss.nn
+- hhmmss.nn
+- hh:mm (defaults to 0 for seconds)
+- hhmm (defaults to 0 for seconds)
+- hh (defaults to 0 for minutes and seconds)
+
+Time Zones
+----------
+
+- Nothing, will use the default timezone given (which in turn defaults to UTC).
+- Z (UTC)
+- +/-hh:mm
+- +/-hhmm
+- +/-hh
+
+Where it Differs From ISO 8601
+==============================
+
+Known differences from the ISO 8601 spec:
+
+- You can use a " " (space) instead of T for separating date from time.
+- Days and months without a leading 0 (2 vs 02) will be parsed.
+- If time zone information is omitted the default time zone given is used (which in turn defaults to UTC). Use a default of None to yield naive datetime instances.
+
+Homepage
+========
+
+- Documentation: http://pyiso8601.readthedocs.org/
+- Source: https://bitbucket.org/micktwomey/pyiso8601/
+
+This was originally hosted at https://code.google.com/p/pyiso8601/
+
+References
+==========
+
+- http://en.wikipedia.org/wiki/ISO_8601
+
+- http://www.cl.cam.ac.uk/~mgk25/iso-time.html - simple overview
+
+- http://hydracen.com/dx/iso8601.htm - more detailed enumeration of valid formats.
+
+Testing
+=======
+
+1. pip install -r dev-requirements.txt
+2. tox
+
+Note that you need all the pythons installed to perform a tox run (see below). Homebrew helps a lot on the mac, however you wind up having to add cellars to your PATH or symlinking the pythonX.Y executables.
+
+Alternatively, to test only with your current python:
+
+1. pip install -r dev-requirements.txt
+2. py.test --verbose iso8601
+
+Supported Python Versions
+=========================
+
+Tested against:
+
+- Python 2.6
+- Python 2.7
+- Python 3.2
+- Python 3.3
+- Python 3.4
+- PyPy
+
+Python 3.0 and 3.1 are untested but should work (tests didn't run under them when last tried).
+
+Jython is untested but should work (tests failed to run).
+
+Python 2.5 is not supported (too old for the tests for the most part). It could work with some small changes but I'm not supporting it.
+
+Changes
+=======
+
+0.1.11
+------
+
+* Add Python 3.4 to tox test config.
+* Add PyPy 3 to tox test config.
+* Link to documentation at http://pyiso8601.readthedocs.org/
+
+
+0.1.10
+------
+
+* Fixes https://bitbucket.org/micktwomey/pyiso8601/issue/14/regression-yyyy-mm-no-longer-parses (thanks to Kevin Gill for reporting)
+* Adds YYYY as a valid date (uses 1 for both month and day)
+* Woo, semantic versioning, .10 at last.
+
+0.1.9
+-----
+
+* Lots of fixes tightening up parsing from jdanjou. In particular more invalid cases are treated as errors. Also includes fixes for tests (which is how these invalid cases got in in the first place).
+* Release addresses https://bitbucket.org/micktwomey/pyiso8601/issue/13/new-release-based-on-critical-bug-fix
+
+0.1.8
+-----
+
+* Remove +/- chars from README.rst and ensure tox tests run using LC_ALL=C. The setup.py egg_info command was failing in python 3.* on some setups (basically any where the system encoding wasn't UTF-8). (https://bitbucket.org/micktwomey/pyiso8601/issue/10/setuppy-broken-for-python-33) (thanks to klmitch)
+
+0.1.7
+-----
+
+* Fix parsing of microseconds (https://bitbucket.org/micktwomey/pyiso8601/issue/9/regression-parsing-microseconds) (Thanks to dims and bnemec)
+
+0.1.6
+-----
+
+* Correct negative timezone offsets (https://bitbucket.org/micktwomey/pyiso8601/issue/8/015-parses-negative-timezones-incorrectly) (thanks to Jonathan Lange)
+
+0.1.5
+-----
+
+* Wow, it's alive! First update since 2007
+* Moved over to https://bitbucket.org/micktwomey/pyiso8601
+* Add support for python 3. https://code.google.com/p/pyiso8601/issues/detail?id=23 (thanks to zefciu)
+* Switched to py.test and tox for testing
+* Make seconds optional in date format ("1997-07-16T19:20+01:00" now valid). https://bitbucket.org/micktwomey/pyiso8601/pull-request/1/make-the-inclusion-of-seconds-optional-in/diff (thanks to Chris Down)
+* Correctly raise ParseError for more invalid inputs (https://bitbucket.org/micktwomey/pyiso8601/issue/1/raise-parseerror-for-invalid-input) (thanks to manish.tomar)
+* Support more variations of ISO 8601 dates, times and time zone specs.
+* Fix microsecond rounding issues (https://bitbucket.org/micktwomey/pyiso8601/issue/2/roundoff-issues-when-parsing-decimal) (thanks to nielsenb at jetfuse.net)
+* Fix pickling and deepcopy of returned datetime objects (https://bitbucket.org/micktwomey/pyiso8601/issue/3/dates-returned-by-parse_date-do-not) (thanks to fogathmann and john at openlearning.com)
+* Fix timezone offsets without a separator (https://bitbucket.org/micktwomey/pyiso8601/issue/4/support-offsets-without-a-separator) (thanks to joe.walton.gglcd)
+* "Z" produces default timezone if one is specified (https://bitbucket.org/micktwomey/pyiso8601/issue/5/z-produces-default-timezone-if-one-is) (thanks to vfaronov). This one may cause problems if you've been relying on default_timezone to use that timezone instead of UTC. Strictly speaking that was wrong but this is potentially backwards incompatible.
+* Handle compact date format (https://bitbucket.org/micktwomey/pyiso8601/issue/6/handle-compact-date-format) (thanks to rvandolson at esri.com)
+
+0.1.4
+-----
+
+* The default_timezone argument wasn't being passed through correctly, UTC was being used in every case. Fixes issue 10.
+
+0.1.3
+-----
+
+* Fixed the microsecond handling, the generated microsecond values were way too small. Fixes issue 9.
+
+0.1.2
+-----
+
+* Adding ParseError to __all__ in iso8601 module, allows people to import it. Addresses issue 7.
+* Be a little more flexible when dealing with dates without leading zeroes. This violates the spec a little, but handles more dates as seen in the field. Addresses issue 6.
+* Allow date/time separators other than T.
+
+0.1.1
+-----
+
+* When parsing dates without a timezone the specified default is used. If no default is specified then UTC is used. Addresses issue 4.
diff --git a/third_party/pyiso8601/dev-requirements.txt b/third_party/pyiso8601/dev-requirements.txt
new file mode 100644
index 0000000..231b44b
--- /dev/null
+++ b/third_party/pyiso8601/dev-requirements.txt
@@ -0,0 +1,5 @@
+devpi>=1.2.1
+pytest>=2.5.2
+Sphinx>=1.2.1
+tox>=1.7.0
+wheel>=0.22.0
\ No newline at end of file
diff --git a/third_party/pyiso8601/docs/Makefile b/third_party/pyiso8601/docs/Makefile
new file mode 100644
index 0000000..2d8a955
--- /dev/null
+++ b/third_party/pyiso8601/docs/Makefile
@@ -0,0 +1,177 @@
+# Makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line.
+SPHINXOPTS    =
+SPHINXBUILD   = sphinx-build
+PAPER         =
+BUILDDIR      = _build
+
+# User-friendly check for sphinx-build
+ifeq ($(shell which $(SPHINXBUILD) >/dev/null 2>&1; echo $$?), 1)
+$(error The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed, then set the SPHINXBUILD environment variable to point to the full path of the '$(SPHINXBUILD)' executable. Alternatively you can add the directory with the executable to your PATH. If you don't have Sphinx installed, grab it from http://sphinx-doc.org/)
+endif
+
+# Internal variables.
+PAPEROPT_a4     = -D latex_paper_size=a4
+PAPEROPT_letter = -D latex_paper_size=letter
+ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
+# the i18n builder cannot share the environment and doctrees with the others
+I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
+
+.PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp devhelp epub latex latexpdf text man changes linkcheck doctest gettext
+
+help:
+	@echo "Please use \`make <target>' where <target> is one of"
+	@echo "  html       to make standalone HTML files"
+	@echo "  dirhtml    to make HTML files named index.html in directories"
+	@echo "  singlehtml to make a single large HTML file"
+	@echo "  pickle     to make pickle files"
+	@echo "  json       to make JSON files"
+	@echo "  htmlhelp   to make HTML files and a HTML help project"
+	@echo "  qthelp     to make HTML files and a qthelp project"
+	@echo "  devhelp    to make HTML files and a Devhelp project"
+	@echo "  epub       to make an epub"
+	@echo "  latex      to make LaTeX files, you can set PAPER=a4 or PAPER=letter"
+	@echo "  latexpdf   to make LaTeX files and run them through pdflatex"
+	@echo "  latexpdfja to make LaTeX files and run them through platex/dvipdfmx"
+	@echo "  text       to make text files"
+	@echo "  man        to make manual pages"
+	@echo "  texinfo    to make Texinfo files"
+	@echo "  info       to make Texinfo files and run them through makeinfo"
+	@echo "  gettext    to make PO message catalogs"
+	@echo "  changes    to make an overview of all changed/added/deprecated items"
+	@echo "  xml        to make Docutils-native XML files"
+	@echo "  pseudoxml  to make pseudoxml-XML files for display purposes"
+	@echo "  linkcheck  to check all external links for integrity"
+	@echo "  doctest    to run all doctests embedded in the documentation (if enabled)"
+
+clean:
+	rm -rf $(BUILDDIR)/*
+
+html:
+	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
+	@echo
+	@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
+
+dirhtml:
+	$(SPHINXBUILD) -b dirhtml $(ALLSPHINXOPTS) $(BUILDDIR)/dirhtml
+	@echo
+	@echo "Build finished. The HTML pages are in $(BUILDDIR)/dirhtml."
+
+singlehtml:
+	$(SPHINXBUILD) -b singlehtml $(ALLSPHINXOPTS) $(BUILDDIR)/singlehtml
+	@echo
+	@echo "Build finished. The HTML page is in $(BUILDDIR)/singlehtml."
+
+pickle:
+	$(SPHINXBUILD) -b pickle $(ALLSPHINXOPTS) $(BUILDDIR)/pickle
+	@echo
+	@echo "Build finished; now you can process the pickle files."
+
+json:
+	$(SPHINXBUILD) -b json $(ALLSPHINXOPTS) $(BUILDDIR)/json
+	@echo
+	@echo "Build finished; now you can process the JSON files."
+
+htmlhelp:
+	$(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) $(BUILDDIR)/htmlhelp
+	@echo
+	@echo "Build finished; now you can run HTML Help Workshop with the" \
+	      ".hhp project file in $(BUILDDIR)/htmlhelp."
+
+qthelp:
+	$(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
+	@echo
+	@echo "Build finished; now you can run "qcollectiongenerator" with the" \
+	      ".qhcp project file in $(BUILDDIR)/qthelp, like this:"
+	@echo "# qcollectiongenerator $(BUILDDIR)/qthelp/pyiso8601.qhcp"
+	@echo "To view the help file:"
+	@echo "# assistant -collectionFile $(BUILDDIR)/qthelp/pyiso8601.qhc"
+
+devhelp:
+	$(SPHINXBUILD) -b devhelp $(ALLSPHINXOPTS) $(BUILDDIR)/devhelp
+	@echo
+	@echo "Build finished."
+	@echo "To view the help file:"
+	@echo "# mkdir -p $$HOME/.local/share/devhelp/pyiso8601"
+	@echo "# ln -s $(BUILDDIR)/devhelp $$HOME/.local/share/devhelp/pyiso8601"
+	@echo "# devhelp"
+
+epub:
+	$(SPHINXBUILD) -b epub $(ALLSPHINXOPTS) $(BUILDDIR)/epub
+	@echo
+	@echo "Build finished. The epub file is in $(BUILDDIR)/epub."
+
+latex:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo
+	@echo "Build finished; the LaTeX files are in $(BUILDDIR)/latex."
+	@echo "Run \`make' in that directory to run these through (pdf)latex" \
+	      "(use \`make latexpdf' here to do that automatically)."
+
+latexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through pdflatex..."
+	$(MAKE) -C $(BUILDDIR)/latex all-pdf
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+latexpdfja:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through platex and dvipdfmx..."
+	$(MAKE) -C $(BUILDDIR)/latex all-pdf-ja
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+text:
+	$(SPHINXBUILD) -b text $(ALLSPHINXOPTS) $(BUILDDIR)/text
+	@echo
+	@echo "Build finished. The text files are in $(BUILDDIR)/text."
+
+man:
+	$(SPHINXBUILD) -b man $(ALLSPHINXOPTS) $(BUILDDIR)/man
+	@echo
+	@echo "Build finished. The manual pages are in $(BUILDDIR)/man."
+
+texinfo:
+	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
+	@echo
+	@echo "Build finished. The Texinfo files are in $(BUILDDIR)/texinfo."
+	@echo "Run \`make' in that directory to run these through makeinfo" \
+	      "(use \`make info' here to do that automatically)."
+
+info:
+	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
+	@echo "Running Texinfo files through makeinfo..."
+	make -C $(BUILDDIR)/texinfo info
+	@echo "makeinfo finished; the Info files are in $(BUILDDIR)/texinfo."
+
+gettext:
+	$(SPHINXBUILD) -b gettext $(I18NSPHINXOPTS) $(BUILDDIR)/locale
+	@echo
+	@echo "Build finished. The message catalogs are in $(BUILDDIR)/locale."
+
+changes:
+	$(SPHINXBUILD) -b changes $(ALLSPHINXOPTS) $(BUILDDIR)/changes
+	@echo
+	@echo "The overview file is in $(BUILDDIR)/changes."
+
+linkcheck:
+	$(SPHINXBUILD) -b linkcheck $(ALLSPHINXOPTS) $(BUILDDIR)/linkcheck
+	@echo
+	@echo "Link check complete; look for any errors in the above output " \
+	      "or in $(BUILDDIR)/linkcheck/output.txt."
+
+doctest:
+	$(SPHINXBUILD) -b doctest $(ALLSPHINXOPTS) $(BUILDDIR)/doctest
+	@echo "Testing of doctests in the sources finished, look at the " \
+	      "results in $(BUILDDIR)/doctest/output.txt."
+
+xml:
+	$(SPHINXBUILD) -b xml $(ALLSPHINXOPTS) $(BUILDDIR)/xml
+	@echo
+	@echo "Build finished. The XML files are in $(BUILDDIR)/xml."
+
+pseudoxml:
+	$(SPHINXBUILD) -b pseudoxml $(ALLSPHINXOPTS) $(BUILDDIR)/pseudoxml
+	@echo
+	@echo "Build finished. The pseudo-XML files are in $(BUILDDIR)/pseudoxml."
diff --git a/third_party/pyiso8601/docs/conf.py b/third_party/pyiso8601/docs/conf.py
new file mode 100644
index 0000000..e69f768
--- /dev/null
+++ b/third_party/pyiso8601/docs/conf.py
@@ -0,0 +1,266 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# pyiso8601 documentation build configuration file, created by
+# sphinx-quickstart on Thu Feb 27 16:05:52 2014.
+#
+# This file is execfile()d with the current directory set to its
+# containing dir.
+#
+# Note that not all possible configuration values are present in this
+# autogenerated file.
+#
+# All configuration values have a default; values that are commented out
+# serve to show the default.
+
+import sys
+import os
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#sys.path.insert(0, os.path.abspath('.'))
+
+# -- General configuration ------------------------------------------------
+
+# If your documentation needs a minimal Sphinx version, state it here.
+#needs_sphinx = '1.0'
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    'sphinx.ext.autodoc',
+    'sphinx.ext.doctest',
+    'sphinx.ext.viewcode',
+]
+
+# doctest configuration
+doctest_path = [os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))]
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# The suffix of source filenames.
+source_suffix = '.rst'
+
+# The encoding of source files.
+#source_encoding = 'utf-8-sig'
+
+# The master toctree document.
+master_doc = 'index'
+
+# General information about the project.
+project = 'pyiso8601'
+copyright = '2014, Michael Twomey'
+
+# The version info for the project you're documenting, acts as replacement for
+# |version| and |release|, also used in various other places throughout the
+# built documents.
+#
+# The short X.Y version.
+version = '0.1.10'
+# The full version, including alpha/beta/rc tags.
+release = '0.1.10'
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#language = None
+
+# There are two options for replacing |today|: either, you set today to some
+# non-false value, then it is used:
+#today = ''
+# Else, today_fmt is used as the format for a strftime call.
+#today_fmt = '%B %d, %Y'
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+exclude_patterns = ['_build']
+
+# The reST default role (used for this markup: `text`) to use for all
+# documents.
+#default_role = None
+
+# If true, '()' will be appended to :func: etc. cross-reference text.
+#add_function_parentheses = True
+
+# If true, the current module name will be prepended to all description
+# unit titles (such as .. function::).
+#add_module_names = True
+
+# If true, sectionauthor and moduleauthor directives will be shown in the
+# output. They are ignored by default.
+#show_authors = False
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = 'sphinx'
+
+# A list of ignored prefixes for module index sorting.
+#modindex_common_prefix = []
+
+# If true, keep warnings as "system message" paragraphs in the built documents.
+#keep_warnings = False
+
+
+# -- Options for HTML output ----------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+html_theme = 'default'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+#html_theme_options = {}
+
+# Add any paths that contain custom themes here, relative to this directory.
+#html_theme_path = []
+
+# The name for this set of Sphinx documents.  If None, it defaults to
+# "<project> v<release> documentation".
+#html_title = None
+
+# A shorter title for the navigation bar.  Default is the same as html_title.
+#html_short_title = None
+
+# The name of an image file (relative to this directory) to place at the top
+# of the sidebar.
+#html_logo = None
+
+# The name of an image file (within the static path) to use as favicon of the
+# docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
+# pixels large.
+#html_favicon = None
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ['_static']
+
+# Add any extra paths that contain custom files (such as robots.txt or
+# .htaccess) here, relative to this directory. These files are copied
+# directly to the root of the documentation.
+#html_extra_path = []
+
+# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
+# using the given strftime format.
+#html_last_updated_fmt = '%b %d, %Y'
+
+# If true, SmartyPants will be used to convert quotes and dashes to
+# typographically correct entities.
+#html_use_smartypants = True
+
+# Custom sidebar templates, maps document names to template names.
+#html_sidebars = {}
+
+# Additional templates that should be rendered to pages, maps page names to
+# template names.
+#html_additional_pages = {}
+
+# If false, no module index is generated.
+#html_domain_indices = True
+
+# If false, no index is generated.
+#html_use_index = True
+
+# If true, the index is split into individual pages for each letter.
+#html_split_index = False
+
+# If true, links to the reST sources are added to the pages.
+#html_show_sourcelink = True
+
+# If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
+#html_show_sphinx = True
+
+# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
+#html_show_copyright = True
+
+# If true, an OpenSearch description file will be output, and all pages will
+# contain a <link> tag referring to it.  The value of this option must be the
+# base URL from which the finished HTML is served.
+#html_use_opensearch = ''
+
+# This is the file name suffix for HTML files (e.g. ".xhtml").
+#html_file_suffix = None
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = 'pyiso8601doc'
+
+
+# -- Options for LaTeX output ---------------------------------------------
+
+latex_elements = {
+# The paper size ('letterpaper' or 'a4paper').
+#'papersize': 'letterpaper',
+
+# The font size ('10pt', '11pt' or '12pt').
+#'pointsize': '10pt',
+
+# Additional stuff for the LaTeX preamble.
+#'preamble': '',
+}
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title,
+#  author, documentclass [howto, manual, or own class]).
+latex_documents = [
+  ('index', 'pyiso8601.tex', 'pyiso8601 Documentation',
+   'Michael Twomey', 'manual'),
+]
+
+# The name of an image file (relative to this directory) to place at the top of
+# the title page.
+#latex_logo = None
+
+# For "manual" documents, if this is true, then toplevel headings are parts,
+# not chapters.
+#latex_use_parts = False
+
+# If true, show page references after internal links.
+#latex_show_pagerefs = False
+
+# If true, show URL addresses after external links.
+#latex_show_urls = False
+
+# Documents to append as an appendix to all manuals.
+#latex_appendices = []
+
+# If false, no module index is generated.
+#latex_domain_indices = True
+
+
+# -- Options for manual page output ---------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('index', 'pyiso8601', 'pyiso8601 Documentation',
+     ['Michael Twomey'], 1)
+]
+
+# If true, show URL addresses after external links.
+#man_show_urls = False
+
+
+# -- Options for Texinfo output -------------------------------------------
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+texinfo_documents = [
+  ('index', 'pyiso8601', 'pyiso8601 Documentation',
+   'Michael Twomey', 'pyiso8601', 'One line description of project.',
+   'Miscellaneous'),
+]
+
+# Documents to append as an appendix to all manuals.
+#texinfo_appendices = []
+
+# If false, no module index is generated.
+#texinfo_domain_indices = True
+
+# How to display URL addresses: 'footnote', 'no', or 'inline'.
+#texinfo_show_urls = 'footnote'
+
+# If true, do not generate a @detailmenu in the "Top" node's menu.
+#texinfo_no_detailmenu = False
diff --git a/third_party/pyiso8601/docs/index.rst b/third_party/pyiso8601/docs/index.rst
new file mode 100644
index 0000000..e28f2dc
--- /dev/null
+++ b/third_party/pyiso8601/docs/index.rst
@@ -0,0 +1,80 @@
+pyiso8601: ISO 8601 Parsing for Python
+======================================
+
+.. image:: https://pypip.in/d/iso8601/badge.png
+
+This module parses the most common forms of ISO 8601 date strings (e.g. 2007-01-14T20:34:22+00:00) into datetime objects.
+
+>>> import iso8601
+>>> iso8601.parse_date("2007-01-25T12:00:00Z")
+datetime.datetime(2007, 1, 25, 12, 0, tzinfo=<iso8601.Utc>)
+>>>
+
+This module is released under a MIT license.
+
+If you want more full featured parsing look at:
+
+- http://labix.org/python-dateutil - python-dateutil
+
+Parsed Formats
+==============
+
+You can parse full date + times, or just the date. In both cases a datetime instance is returned but with missing times defaulting to 0, and missing days / months defaulting to 1.
+
+Dates
+-----
+
+- YYYY-MM-DD
+- YYYYMMDD
+- YYYY-MM (defaults to 1 for the day)
+- YYYY (defaults to 1 for month and day)
+
+Times
+-----
+
+- hh:mm:ss.nn
+- hhmmss.nn
+- hh:mm (defaults to 0 for seconds)
+- hhmm (defaults to 0 for seconds)
+- hh (defaults to 0 for minutes and seconds)
+
+Time Zones
+----------
+
+- Nothing uses the default timezone given (UTC).
+- Z (UTC)
+- +/-hh:mm
+- +/-hhmm
+- +/-hh
+
+Where it Differs From ISO 8601
+==============================
+
+Known differences from the ISO 8601 spec:
+
+- You can use a " " (space) instead of T for separating date from time.
+- Days and months without a leading 0 (2 vs 02) will be parsed.
+- If time zone information is omitted the default time zone given is used (which in turn defaults to UTC). Use a default of None to yield naive datetime instances.
+
+Installation
+============
+
+To install simply use pip::
+
+    pip install iso8601
+
+
+API
+===
+
+.. autofunction:: iso8601.parse_date
+
+.. autoexception:: iso8601.ParseError
+
+Authors
+=======
+
+Currently active committers:
+
+- Michael Twomey
+- Julien Danjou
diff --git a/third_party/pyiso8601/docs/make.bat b/third_party/pyiso8601/docs/make.bat
new file mode 100644
index 0000000..91048b0
--- /dev/null
+++ b/third_party/pyiso8601/docs/make.bat
@@ -0,0 +1,242 @@
+ at ECHO OFF
+
+REM Command file for Sphinx documentation
+
+if "%SPHINXBUILD%" == "" (
+	set SPHINXBUILD=sphinx-build
+)
+set BUILDDIR=_build
+set ALLSPHINXOPTS=-d %BUILDDIR%/doctrees %SPHINXOPTS% .
+set I18NSPHINXOPTS=%SPHINXOPTS% .
+if NOT "%PAPER%" == "" (
+	set ALLSPHINXOPTS=-D latex_paper_size=%PAPER% %ALLSPHINXOPTS%
+	set I18NSPHINXOPTS=-D latex_paper_size=%PAPER% %I18NSPHINXOPTS%
+)
+
+if "%1" == "" goto help
+
+if "%1" == "help" (
+	:help
+	echo.Please use `make ^<target^>` where ^<target^> is one of
+	echo.  html       to make standalone HTML files
+	echo.  dirhtml    to make HTML files named index.html in directories
+	echo.  singlehtml to make a single large HTML file
+	echo.  pickle     to make pickle files
+	echo.  json       to make JSON files
+	echo.  htmlhelp   to make HTML files and a HTML help project
+	echo.  qthelp     to make HTML files and a qthelp project
+	echo.  devhelp    to make HTML files and a Devhelp project
+	echo.  epub       to make an epub
+	echo.  latex      to make LaTeX files, you can set PAPER=a4 or PAPER=letter
+	echo.  text       to make text files
+	echo.  man        to make manual pages
+	echo.  texinfo    to make Texinfo files
+	echo.  gettext    to make PO message catalogs
+	echo.  changes    to make an overview over all changed/added/deprecated items
+	echo.  xml        to make Docutils-native XML files
+	echo.  pseudoxml  to make pseudoxml-XML files for display purposes
+	echo.  linkcheck  to check all external links for integrity
+	echo.  doctest    to run all doctests embedded in the documentation if enabled
+	goto end
+)
+
+if "%1" == "clean" (
+	for /d %%i in (%BUILDDIR%\*) do rmdir /q /s %%i
+	del /q /s %BUILDDIR%\*
+	goto end
+)
+
+
+%SPHINXBUILD% 2> nul
+if errorlevel 9009 (
+	echo.
+	echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
+	echo.installed, then set the SPHINXBUILD environment variable to point
+	echo.to the full path of the 'sphinx-build' executable. Alternatively you
+	echo.may add the Sphinx directory to PATH.
+	echo.
+	echo.If you don't have Sphinx installed, grab it from
+	echo.http://sphinx-doc.org/
+	exit /b 1
+)
+
+if "%1" == "html" (
+	%SPHINXBUILD% -b html %ALLSPHINXOPTS% %BUILDDIR%/html
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The HTML pages are in %BUILDDIR%/html.
+	goto end
+)
+
+if "%1" == "dirhtml" (
+	%SPHINXBUILD% -b dirhtml %ALLSPHINXOPTS% %BUILDDIR%/dirhtml
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The HTML pages are in %BUILDDIR%/dirhtml.
+	goto end
+)
+
+if "%1" == "singlehtml" (
+	%SPHINXBUILD% -b singlehtml %ALLSPHINXOPTS% %BUILDDIR%/singlehtml
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The HTML pages are in %BUILDDIR%/singlehtml.
+	goto end
+)
+
+if "%1" == "pickle" (
+	%SPHINXBUILD% -b pickle %ALLSPHINXOPTS% %BUILDDIR%/pickle
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished; now you can process the pickle files.
+	goto end
+)
+
+if "%1" == "json" (
+	%SPHINXBUILD% -b json %ALLSPHINXOPTS% %BUILDDIR%/json
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished; now you can process the JSON files.
+	goto end
+)
+
+if "%1" == "htmlhelp" (
+	%SPHINXBUILD% -b htmlhelp %ALLSPHINXOPTS% %BUILDDIR%/htmlhelp
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished; now you can run HTML Help Workshop with the ^
+.hhp project file in %BUILDDIR%/htmlhelp.
+	goto end
+)
+
+if "%1" == "qthelp" (
+	%SPHINXBUILD% -b qthelp %ALLSPHINXOPTS% %BUILDDIR%/qthelp
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished; now you can run "qcollectiongenerator" with the ^
+.qhcp project file in %BUILDDIR%/qthelp, like this:
+	echo.^> qcollectiongenerator %BUILDDIR%\qthelp\pyiso8601.qhcp
+	echo.To view the help file:
+	echo.^> assistant -collectionFile %BUILDDIR%\qthelp\pyiso8601.ghc
+	goto end
+)
+
+if "%1" == "devhelp" (
+	%SPHINXBUILD% -b devhelp %ALLSPHINXOPTS% %BUILDDIR%/devhelp
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished.
+	goto end
+)
+
+if "%1" == "epub" (
+	%SPHINXBUILD% -b epub %ALLSPHINXOPTS% %BUILDDIR%/epub
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The epub file is in %BUILDDIR%/epub.
+	goto end
+)
+
+if "%1" == "latex" (
+	%SPHINXBUILD% -b latex %ALLSPHINXOPTS% %BUILDDIR%/latex
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished; the LaTeX files are in %BUILDDIR%/latex.
+	goto end
+)
+
+if "%1" == "latexpdf" (
+	%SPHINXBUILD% -b latex %ALLSPHINXOPTS% %BUILDDIR%/latex
+	cd %BUILDDIR%/latex
+	make all-pdf
+	cd %BUILDDIR%/..
+	echo.
+	echo.Build finished; the PDF files are in %BUILDDIR%/latex.
+	goto end
+)
+
+if "%1" == "latexpdfja" (
+	%SPHINXBUILD% -b latex %ALLSPHINXOPTS% %BUILDDIR%/latex
+	cd %BUILDDIR%/latex
+	make all-pdf-ja
+	cd %BUILDDIR%/..
+	echo.
+	echo.Build finished; the PDF files are in %BUILDDIR%/latex.
+	goto end
+)
+
+if "%1" == "text" (
+	%SPHINXBUILD% -b text %ALLSPHINXOPTS% %BUILDDIR%/text
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The text files are in %BUILDDIR%/text.
+	goto end
+)
+
+if "%1" == "man" (
+	%SPHINXBUILD% -b man %ALLSPHINXOPTS% %BUILDDIR%/man
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The manual pages are in %BUILDDIR%/man.
+	goto end
+)
+
+if "%1" == "texinfo" (
+	%SPHINXBUILD% -b texinfo %ALLSPHINXOPTS% %BUILDDIR%/texinfo
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The Texinfo files are in %BUILDDIR%/texinfo.
+	goto end
+)
+
+if "%1" == "gettext" (
+	%SPHINXBUILD% -b gettext %I18NSPHINXOPTS% %BUILDDIR%/locale
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The message catalogs are in %BUILDDIR%/locale.
+	goto end
+)
+
+if "%1" == "changes" (
+	%SPHINXBUILD% -b changes %ALLSPHINXOPTS% %BUILDDIR%/changes
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.The overview file is in %BUILDDIR%/changes.
+	goto end
+)
+
+if "%1" == "linkcheck" (
+	%SPHINXBUILD% -b linkcheck %ALLSPHINXOPTS% %BUILDDIR%/linkcheck
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Link check complete; look for any errors in the above output ^
+or in %BUILDDIR%/linkcheck/output.txt.
+	goto end
+)
+
+if "%1" == "doctest" (
+	%SPHINXBUILD% -b doctest %ALLSPHINXOPTS% %BUILDDIR%/doctest
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Testing of doctests in the sources finished, look at the ^
+results in %BUILDDIR%/doctest/output.txt.
+	goto end
+)
+
+if "%1" == "xml" (
+	%SPHINXBUILD% -b xml %ALLSPHINXOPTS% %BUILDDIR%/xml
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The XML files are in %BUILDDIR%/xml.
+	goto end
+)
+
+if "%1" == "pseudoxml" (
+	%SPHINXBUILD% -b pseudoxml %ALLSPHINXOPTS% %BUILDDIR%/pseudoxml
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The pseudo-XML files are in %BUILDDIR%/pseudoxml.
+	goto end
+)
+
+:end
diff --git a/third_party/pyiso8601/iso8601/__init__.py b/third_party/pyiso8601/iso8601/__init__.py
new file mode 100644
index 0000000..11b1adc
--- /dev/null
+++ b/third_party/pyiso8601/iso8601/__init__.py
@@ -0,0 +1 @@
+from .iso8601 import *
diff --git a/third_party/pyiso8601/iso8601/iso8601.py b/third_party/pyiso8601/iso8601/iso8601.py
new file mode 100644
index 0000000..1ae810a
--- /dev/null
+++ b/third_party/pyiso8601/iso8601/iso8601.py
@@ -0,0 +1,214 @@
+"""ISO 8601 date time string parsing
+
+Basic usage:
+>>> import iso8601
+>>> iso8601.parse_date("2007-01-25T12:00:00Z")
+datetime.datetime(2007, 1, 25, 12, 0, tzinfo=<iso8601.iso8601.Utc ...>)
+>>>
+
+"""
+
+from datetime import (
+    datetime,
+    timedelta,
+    tzinfo
+)
+from decimal import Decimal
+import logging
+import sys
+import re
+
+__all__ = ["parse_date", "ParseError", "UTC"]
+
+LOG = logging.getLogger(__name__)
+
+if sys.version_info >= (3, 0, 0):
+    _basestring = str
+else:
+    _basestring = basestring
+
+
+# Adapted from http://delete.me.uk/2005/03/iso8601.html
+ISO8601_REGEX = re.compile(
+    r"""
+    (?P<year>[0-9]{4})
+    (
+        (
+            (-(?P<monthdash>[0-9]{1,2}))
+            |
+            (?P<month>[0-9]{2})
+            (?!$)  # Don't allow YYYYMM
+        )
+        (
+            (
+                (-(?P<daydash>[0-9]{1,2}))
+                |
+                (?P<day>[0-9]{2})
+            )
+            (
+                (
+                    (?P<separator>[ T])
+                    (?P<hour>[0-9]{2})
+                    (:{0,1}(?P<minute>[0-9]{2})){0,1}
+                    (
+                        :{0,1}(?P<second>[0-9]{1,2})
+                        (\.(?P<second_fraction>[0-9]+)){0,1}
+                    ){0,1}
+                    (?P<timezone>
+                        Z
+                        |
+                        (
+                            (?P<tz_sign>[-+])
+                            (?P<tz_hour>[0-9]{2})
+                            :{0,1}
+                            (?P<tz_minute>[0-9]{2}){0,1}
+                        )
+                    ){0,1}
+                ){0,1}
+            )
+        ){0,1}  # YYYY-MM
+    ){0,1}  # YYYY only
+    $
+    """,
+    re.VERBOSE
+)
+
+class ParseError(Exception):
+    """Raised when there is a problem parsing a date string"""
+
+# Yoinked from python docs
+ZERO = timedelta(0)
+class Utc(tzinfo):
+    """UTC Timezone
+
+    """
+    def utcoffset(self, dt):
+        return ZERO
+
+    def tzname(self, dt):
+        return "UTC"
+
+    def dst(self, dt):
+        return ZERO
+
+    def __repr__(self):
+        return "<iso8601.Utc>"
+
+UTC = Utc()
+
+class FixedOffset(tzinfo):
+    """Fixed offset in hours and minutes from UTC
+
+    """
+    def __init__(self, offset_hours, offset_minutes, name):
+        self.__offset_hours = offset_hours  # Keep for later __getinitargs__
+        self.__offset_minutes = offset_minutes  # Keep for later __getinitargs__
+        self.__offset = timedelta(hours=offset_hours, minutes=offset_minutes)
+        self.__name = name
+
+    def __eq__(self, other):
+        if isinstance(other, FixedOffset):
+            return (
+                (other.__offset == self.__offset)
+                and
+                (other.__name == self.__name)
+            )
+        if isinstance(other, tzinfo):
+            return other == self
+        return False
+
+    def __getinitargs__(self):
+        return (self.__offset_hours, self.__offset_minutes, self.__name)
+
+    def utcoffset(self, dt):
+        return self.__offset
+
+    def tzname(self, dt):
+        return self.__name
+
+    def dst(self, dt):
+        return ZERO
+
+    def __repr__(self):
+        return "<FixedOffset %r %r>" % (self.__name, self.__offset)
+
+def to_int(d, key, default_to_zero=False, default=None, required=True):
+    """Pull a value from the dict and convert to int
+
+    :param default_to_zero: If the value is None or empty, treat it as zero
+    :param default: If the value is missing in the dict use this default
+
+    """
+    value = d.get(key) or default
+    LOG.debug("Got %r for %r with default %r", value, key, default)
+    if (value in ["", None]) and default_to_zero:
+        return 0
+    if value is None:
+        if required:
+            raise ParseError("Unable to read %s from %s" % (key, d))
+    else:
+        return int(value)
+
+def parse_timezone(matches, default_timezone=UTC):
+    """Parses ISO 8601 time zone specs into tzinfo offsets
+
+    """
+
+    if matches["timezone"] == "Z":
+        return UTC
+    # This isn't strictly correct, but it's common to encounter dates without
+    # timezones so I'll assume the default (which defaults to UTC).
+    # Addresses issue 4.
+    if matches["timezone"] is None:
+        return default_timezone
+    sign = matches["tz_sign"]
+    hours = to_int(matches, "tz_hour")
+    minutes = to_int(matches, "tz_minute", default_to_zero=True)
+    description = "%s%02d:%02d" % (sign, hours, minutes)
+    if sign == "-":
+        hours = -hours
+        minutes = -minutes
+    return FixedOffset(hours, minutes, description)
+
+def parse_date(datestring, default_timezone=UTC):
+    """Parses ISO 8601 dates into datetime objects
+
+    The timezone is parsed from the date string. However it is quite common to
+    have dates without a timezone (not strictly correct). In this case the
+    default timezone specified in default_timezone is used. This is UTC by
+    default.
+
+    :param datestring: The date to parse as a string
+    :param default_timezone: A datetime tzinfo instance to use when no timezone
+                             is specified in the datestring. If this is set to
+                             None then a naive datetime object is returned.
+    :returns: A datetime.datetime instance
+    :raises: ParseError when there is a problem parsing the date or
+             constructing the datetime instance.
+
+    """
+    if not isinstance(datestring, _basestring):
+        raise ParseError("Expecting a string %r" % datestring)
+    m = ISO8601_REGEX.match(datestring)
+    if not m:
+        raise ParseError("Unable to parse date string %r" % datestring)
+    groups = m.groupdict()
+    LOG.debug("Parsed %s into %s with default timezone %s", datestring, groups, default_timezone)
+
+    tz = parse_timezone(groups, default_timezone=default_timezone)
+
+    groups["second_fraction"] = int(Decimal("0.%s" % (groups["second_fraction"] or 0)) * Decimal("1000000.0"))
+
+    try:
+        return datetime(
+            year=to_int(groups, "year"),
+            month=to_int(groups, "month", default=to_int(groups, "monthdash", required=False, default=1)),
+            day=to_int(groups, "day", default=to_int(groups, "daydash", required=False, default=1)),
+            hour=to_int(groups, "hour", default_to_zero=True),
+            minute=to_int(groups, "minute", default_to_zero=True),
+            second=to_int(groups, "second", default_to_zero=True),
+            microsecond=groups["second_fraction"],
+            tzinfo=tz,
+        )
+    except Exception as e:
+        raise ParseError(e)
diff --git a/third_party/pyiso8601/iso8601/test_iso8601.py b/third_party/pyiso8601/iso8601/test_iso8601.py
new file mode 100644
index 0000000..ed2d45a
--- /dev/null
+++ b/third_party/pyiso8601/iso8601/test_iso8601.py
@@ -0,0 +1,97 @@
+# coding=UTF-8
+from __future__ import absolute_import
+
+import copy
+import datetime
+import pickle
+
+import pytest
+
+from iso8601 import iso8601
+
+def test_iso8601_regex():
+    assert iso8601.ISO8601_REGEX.match("2006-10-11T00:14:33Z")
+
+def test_parse_no_timezone_different_default():
+    tz = iso8601.FixedOffset(2, 0, "test offset")
+    d = iso8601.parse_date("2007-01-01T08:00:00", default_timezone=tz)
+    assert d == datetime.datetime(2007, 1, 1, 8, 0, 0, 0, tz)
+    assert d.tzinfo == tz
+
+def test_parse_utc_different_default():
+    """Z should mean 'UTC', not 'default'.
+
+    """
+    tz = iso8601.FixedOffset(2, 0, "test offset")
+    d = iso8601.parse_date("2007-01-01T08:00:00Z", default_timezone=tz)
+    assert d == datetime.datetime(2007, 1, 1, 8, 0, 0, 0, iso8601.UTC)
+
+ at pytest.mark.parametrize("invalid_date, error_string", [
+    ("2013-10-", "Unable to parse date string"),
+    ("2013-", "Unable to parse date string"),
+    ("", "Unable to parse date string"),
+    (None, "Expecting a string"),
+    ("wibble", "Unable to parse date string"),
+    ("23", "Unable to parse date string"),
+    ("131015T142533Z", "Unable to parse date string"),
+    ("131015", "Unable to parse date string"),
+    ("20141", "Unable to parse date string"),
+    ("201402", "Unable to parse date string"),
+    ("2007-06-23X06:40:34.00Z", "Unable to parse date string"),  # https://code.google.com/p/pyiso8601/issues/detail?id=14
+    ("2007-06-23 06:40:34.00Zrubbish", "Unable to parse date string"),  # https://code.google.com/p/pyiso8601/issues/detail?id=14
+    ("20114-01-03T01:45:49", "Unable to parse date string"),
+])
+def test_parse_invalid_date(invalid_date, error_string):
+    assert isinstance(invalid_date, str) or invalid_date is None  # Why? 'cos I've screwed up the parametrize before :)
+    with pytest.raises(iso8601.ParseError) as exc:
+        iso8601.parse_date(invalid_date)
+    assert exc.errisinstance(iso8601.ParseError)
+    assert str(exc.value).startswith(error_string)
+
+ at pytest.mark.parametrize("valid_date,expected_datetime,isoformat", [
+    ("2007-06-23 06:40:34.00Z", datetime.datetime(2007, 6, 23, 6, 40, 34, 0, iso8601.UTC), "2007-06-23T06:40:34+00:00"),  # Handle a separator other than T
+    ("1997-07-16T19:20+01:00", datetime.datetime(1997, 7, 16, 19, 20, 0, 0, iso8601.FixedOffset(1, 0, "+01:00")), "1997-07-16T19:20:00+01:00"),  # Parse with no seconds
+    ("2007-01-01T08:00:00", datetime.datetime(2007, 1, 1, 8, 0, 0, 0, iso8601.UTC), "2007-01-01T08:00:00+00:00"),  # Handle timezone-less dates. Assumes UTC. http://code.google.com/p/pyiso8601/issues/detail?id=4
+    ("2006-10-20T15:34:56.123+02:30", datetime.datetime(2006, 10, 20, 15, 34, 56, 123000, iso8601.FixedOffset(2, 30, "+02:30")), None),
+    ("2006-10-20T15:34:56Z", datetime.datetime(2006, 10, 20, 15, 34, 56, 0, iso8601.UTC), "2006-10-20T15:34:56+00:00"),
+    ("2007-5-7T11:43:55.328Z", datetime.datetime(2007, 5, 7, 11, 43, 55, 328000, iso8601.UTC), "2007-05-07T11:43:55.328000+00:00"),  # http://code.google.com/p/pyiso8601/issues/detail?id=6
+    ("2006-10-20T15:34:56.123Z", datetime.datetime(2006, 10, 20, 15, 34, 56, 123000, iso8601.UTC), "2006-10-20T15:34:56.123000+00:00"),
+    ("2013-10-15T18:30Z", datetime.datetime(2013, 10, 15, 18, 30, 0, 0, iso8601.UTC), "2013-10-15T18:30:00+00:00"),
+    ("2013-10-15T22:30+04", datetime.datetime(2013, 10, 15, 22, 30, 0, 0, iso8601.FixedOffset(4, 0, "+04:00")), "2013-10-15T22:30:00+04:00"),  # <time>±hh:mm
+    ("2013-10-15T1130-0700", datetime.datetime(2013, 10, 15, 11, 30, 0, 0, iso8601.FixedOffset(-7, 0, "-07:00")), "2013-10-15T11:30:00-07:00"),  # <time>±hhmm
+    ("2013-10-15T1130+0700", datetime.datetime(2013, 10, 15, 11, 30, 0, 0, iso8601.FixedOffset(+7, 0, "+07:00")), "2013-10-15T11:30:00+07:00"),  # <time>±hhmm
+    ("2013-10-15T1130+07", datetime.datetime(2013, 10, 15, 11, 30, 0, 0, iso8601.FixedOffset(+7, 0, "+07:00")), "2013-10-15T11:30:00+07:00"),  # <time>±hh
+    ("2013-10-15T1130-07", datetime.datetime(2013, 10, 15, 11, 30, 0, 0, iso8601.FixedOffset(-7, 0, "-07:00")), "2013-10-15T11:30:00-07:00"),  # <time>±hh
+    ("2013-10-15T15:00-03:30", datetime.datetime(2013, 10, 15, 15, 0, 0, 0, iso8601.FixedOffset(-3, -30, "-03:30")), "2013-10-15T15:00:00-03:30"),
+    ("2013-10-15T183123Z", datetime.datetime(2013, 10, 15, 18, 31, 23, 0, iso8601.UTC), "2013-10-15T18:31:23+00:00"),  # hhmmss
+    ("2013-10-15T1831Z", datetime.datetime(2013, 10, 15, 18, 31, 0, 0, iso8601.UTC), "2013-10-15T18:31:00+00:00"),  # hhmm
+    ("2013-10-15T18Z", datetime.datetime(2013, 10, 15, 18, 0, 0, 0, iso8601.UTC), "2013-10-15T18:00:00+00:00"),  # hh
+    ("2013-10-15", datetime.datetime(2013, 10, 15, 0, 0, 0, 0, iso8601.UTC), "2013-10-15T00:00:00+00:00"),  # YYYY-MM-DD
+    ("20131015T18:30Z", datetime.datetime(2013, 10, 15, 18, 30, 0, 0, iso8601.UTC), "2013-10-15T18:30:00+00:00"),  # YYYYMMDD
+    ("2012-12-19T23:21:28.512400+00:00", datetime.datetime(2012, 12, 19, 23, 21, 28, 512400, iso8601.FixedOffset(0, 0, "+00:00")), "2012-12-19T23:21:28.512400+00:00"),  # https://code.google.com/p/pyiso8601/issues/detail?id=21
+    ("2006-10-20T15:34:56.123+0230", datetime.datetime(2006, 10, 20, 15, 34, 56, 123000, iso8601.FixedOffset(2, 30, "+02:30")), "2006-10-20T15:34:56.123000+02:30"),  # https://code.google.com/p/pyiso8601/issues/detail?id=18
+    ("19950204", datetime.datetime(1995, 2, 4, tzinfo=iso8601.UTC), "1995-02-04T00:00:00+00:00"),  # https://code.google.com/p/pyiso8601/issues/detail?id=1
+    ("2010-07-20 15:25:52.520701+00:00", datetime.datetime(2010, 7, 20, 15, 25, 52, 520701, iso8601.FixedOffset(0, 0, "+00:00")), "2010-07-20T15:25:52.520701+00:00"),  # https://code.google.com/p/pyiso8601/issues/detail?id=17
+    ("2010-06-12", datetime.datetime(2010, 6, 12, tzinfo=iso8601.UTC), "2010-06-12T00:00:00+00:00"),  # https://code.google.com/p/pyiso8601/issues/detail?id=16
+    ("1985-04-12T23:20:50.52-05:30", datetime.datetime(1985, 4, 12, 23, 20, 50, 520000, iso8601.FixedOffset(-5, -30, "-05:30")), "1985-04-12T23:20:50.520000-05:30"),  # https://bitbucket.org/micktwomey/pyiso8601/issue/8/015-parses-negative-timezones-incorrectly
+    ("1997-08-29T06:14:00.000123Z", datetime.datetime(1997, 8, 29, 6, 14, 0, 123, iso8601.UTC), "1997-08-29T06:14:00.000123+00:00"),  # https://bitbucket.org/micktwomey/pyiso8601/issue/9/regression-parsing-microseconds
+    ("2014-02", datetime.datetime(2014, 2, 1, 0, 0, 0, 0, iso8601.UTC), "2014-02-01T00:00:00+00:00"),  # https://bitbucket.org/micktwomey/pyiso8601/issue/14/regression-yyyy-mm-no-longer-parses
+    ("2014", datetime.datetime(2014, 1, 1, 0, 0, 0, 0, iso8601.UTC), "2014-01-01T00:00:00+00:00"),  # YYYY
+])
+def test_parse_valid_date(valid_date, expected_datetime, isoformat):
+    parsed = iso8601.parse_date(valid_date)
+    assert parsed.year == expected_datetime.year
+    assert parsed.month == expected_datetime.month
+    assert parsed.day == expected_datetime.day
+    assert parsed.hour == expected_datetime.hour
+    assert parsed.minute == expected_datetime.minute
+    assert parsed.second == expected_datetime.second
+    assert parsed.microsecond == expected_datetime.microsecond
+    assert parsed.tzinfo == expected_datetime.tzinfo
+    assert parsed == expected_datetime
+    assert parsed.isoformat() == expected_datetime.isoformat()
+    copy.deepcopy(parsed)  # ensure it's deep copy-able
+    pickle.dumps(parsed)  # ensure it pickles
+    if isoformat:
+        assert parsed.isoformat() == isoformat
+    assert iso8601.parse_date(parsed.isoformat()) == parsed  # Test round trip
diff --git a/third_party/pyiso8601/setup.py b/third_party/pyiso8601/setup.py
new file mode 100644
index 0000000..e9dc75d
--- /dev/null
+++ b/third_party/pyiso8601/setup.py
@@ -0,0 +1,25 @@
+import os
+
+try:
+    from setuptools import setup
+except ImportError:
+    from distutils import setup
+
+long_description = open(os.path.join(os.path.dirname(__file__), "README.rst")).read()
+
+setup(
+    name="iso8601",
+    version="0.1.11",
+    description=long_description.split("\n")[0],
+    long_description=long_description,
+    author="Michael Twomey",
+    author_email="micktwomey+iso8601 at gmail.com",
+    url="https://bitbucket.org/micktwomey/pyiso8601",
+    packages=["iso8601"],
+    license="MIT",
+    classifiers=[
+        "License :: OSI Approved :: MIT License",
+        "Programming Language :: Python :: 2",
+        "Programming Language :: Python :: 3",
+    ],
+)
diff --git a/third_party/pyiso8601/tox.ini b/third_party/pyiso8601/tox.ini
new file mode 100644
index 0000000..f3a8758
--- /dev/null
+++ b/third_party/pyiso8601/tox.ini
@@ -0,0 +1,8 @@
+[tox]
+envlist = py26,py27,py32,py33,py34,pypy,pypy3
+
+[testenv]
+deps=pytest>=2.4.2
+commands=py.test --verbose iso8601
+setenv =
+    LC_ALL=C
diff --git a/third_party/wscript_build b/third_party/wscript_build
index 0be8474..9a5fabc 100644
--- a/third_party/wscript_build
+++ b/third_party/wscript_build
@@ -5,6 +5,7 @@ import os
 # work out what python external libraries we need to install
 external_libs = {
     "dns.resolver": "dnspython/dns",
+    "iso8601": "pyiso8601",
     }
 
 list = []
-- 
2.1.4



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