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
fixing pyplot.py generating boilerplate code to avoid unicode strings
updating outdated comment in boilerplate.py
Merge pull request #2923 from sfroid/issue_2899

Issue 2899