add appveyor.yml configuration
add appveyor.yml configuration

Run the tests on Python 2.7, 3.5 and 3.6, 32 and 64 bits.
If tests are successful, also build wheels and upload to appveyor ci build report.

Auto-deployment on tags to PyPI and Github is currently disabled, as Adam needs to supply encrypted PyPI credentials and github oauth token.

obp/py-zopfli,obp/py-zopfli,obp/py-zopfli,obp/zopfli,obp/zopfli,obp/zopfli