Don't version *.pyc files

These are compiled automatically from the *.py files at install time.
They landed in c7f3d033 (Initial commit, 2014-11-23), a commit before
the .gitignore line that would have ignored them (*.py[cod]) landed in
f91cf1bf (Added .gitignore for python, 2014-11-23).
Merge pull request #1 from wking/no-pyc

Don't version *.pyc files