currently uses GITHUB_PASSWORD set in envvar, but should use hub gem authentication like the set_service_hook task does.
currently just takes to first ssh key from the github user, but should probably load all keys from GitHub into the user's data_bag item. (Will want to provide feedback of what's happening, but should be safe to assume that any public key attached to a github account is safe... there's a bigger issue if this isn't true)
https://github.com/myplanetdigital/jenkins-inception/blob/develop/Rakefile#L22-L95
Things that need fixing:
set_service_hook
task does.