add pydocstyle support

[mr-c]

Closes #52

[coveralls]

Coverage decreased (-0.05%) to 99.024% when pulling 202d793 on mr-c:pydocstyle into b154751 on Bachmann1234:master.

[Bachmann1234]

Awesome! Thanks for the PR.

Only issue is this needs some tests. There should be a bunch of examples in the code

[coveralls]

Coverage decreased (-0.03%) to 99.035% when pulling 9acc2ab on mr-c:pydocstyle into b154751 on Bachmann1234:master.

[Bachmann1234]

Looks like python 2.6 is not working quite right. Not 100% clear why. Ill see if I can find some time to look into this

[lyndsysimon]

It looks like pydocstyle doesn't support 2.6. The failing test for 2.6 is happening because pydocstyle --version returns the following traceback under 2.6:

Traceback (most recent call last):
  File "/Users/lyndsy.simon/src/pypi/diff-cover/.tox/py26/bin/pydocstyle", line 7, in <module>
    from pydocstyle.cli import main
  File "/Users/lyndsy.simon/src/pypi/diff-cover/.tox/py26/lib/python2.6/site-packages/pydocstyle/__init__.py", line 1, in <module>
    from .checker import check
  File "/Users/lyndsy.simon/src/pypi/diff-cover/.tox/py26/lib/python2.6/site-packages/pydocstyle/checker.py", line 11, in <module>
    from . import violations
  File "/Users/lyndsy.simon/src/pypi/diff-cover/.tox/py26/lib/python2.6/site-packages/pydocstyle/violations.py", line 242
    'pep257': all_errors - {'D203', 'D212', 'D213', 'D214', 'D215', 'D404',
                                  ^
SyntaxError: invalid syntax

[Bachmann1234]

Ah. That makes sense. Good on them.

But for our purposes I think all that's needed is a better error message. "Pydocstyle does not support python 2.6"

If the build is still complaining about coverage after that I'll work around it

[coveralls]

Coverage increased (+0.01%) to 99.081% when pulling fee69a9 on mr-c:pydocstyle into b154751 on Bachmann1234:master.

[mr-c]

I think this is ready for merging, thanks!

I made an issue to provide a better user experience with pydocstyle and Python 2.6: PyCQA/pydocstyle#271

[Bachmann1234]

Yep! I'll merge and do a release sometime this weekend or early next week (Monday at the latest )

[Bachmann1234]

Thanks!

[Bachmann1234]

Released! Thanks https://pypi.python.org/pypi/diff_cover/0.9.12