DOC : removed line about un-needed dependencies in Windows

We no longer bundle `dateutil` or `pyparsing`.
Radius fix in _path.cpp

Updated the points_in_path method to allow negative radii as is implied by the documentation.
adding the linewidth keyword argument to pie
#2899 Adding kwargs to pie which can handle args for both wedge and text elements separately
#2899 almost final changes for adding wedge and text kwargs to pie. needs feedback on generated pyplot
cleaning up code. Added tests and test images
removing empty line for pep8 test
BUG: Removes iteration over locals (no-no) in mathtext
fixing pyplot.py generating boilerplate code to avoid unicode strings
updating outdated comment in boilerplate.py
PEP8 : fixed all E71[3,4] failures
PEP8 : Squelch spurious tests

The new ignore tests (E111, E112, E113, E265) are just picking up
style infractions on the comments.
Added test for negative radius in Path.contains_points
Added point which is inside the unit circle but not inside a circle of radius 0.5
Merge pull request #2930 from tacaswell/cranky_pep8

Cranky pep8
Merge pull request #2923 from sfroid/issue_2899

Issue 2899
adding test for pie ccw. Also removing pdf and svg files from pie linewidth tests
#2897 changing comment for the pie clockwise test
adding changelog entry
#2897 removing ccw=false test