Add an option to disable SSL verification.

[pedramamini]

To support Github Enterprise installs with self-signed certificates. It's a simple monkey-patch:

import ssl
ssl._create_default_https_context = ssl._create_unverified_context

[jdmallen]

I've tested this on our Enterprise edition of GH (2.2.0) and this did indeed fix my SSL issues. Please add this!

[conschneider]

That just saved my morning as well. Thanks a lot!