https://pypi.python.org/packages/source/c/certifi/certifi-2015.11.20.tar.gz#md5=25134646672c695c1ff1593c2dd75d08
https://pypi.python.org/packages/source/w/wincertstore/wincertstore-0.2.zip#md5=ae728f2f007185648d0c7a8679b361e2