Make lib/octopolo/github the access point

There were some major circular dependancy issues happening with these
files, and instead of trying to make them all play nice, they will all
now just load octopolo/github if that is needed by itself.
More moving of github to require entry point
Removes github-auth from lib/octopolo/github
Removes gli hack for tests
Version bump
Merge pull request #27 from origin/fix-dependancy-issues
Updates the CHANGELOG