https://pypi.python.org/packages/source/c/certifi/certifi-2016.2.28.tar.gz#md5=5d672aa766e1f773c75cfeccd02d3650
https://pypi.python.org/packages/source/w/wincertstore/wincertstore-0.2.zip#md5=ae728f2f007185648d0c7a8679b361e2