Don't include *.pyc files in source/binary distributions.

This is almost always wrong, you only want to distribute source code,
not Interpreter-dependant binary code. As an example, using the current
tarballs hosted on PyPI will break with Python-2.6 due to non-matching
magic number of the *.pyc files.
Merge pull request #251 from saschpe/master

Don't include *.pyc files in source/binary distributions.