Adding GitHub enterprise support, GitHub OAuth Support, Cross-Repo Pull Request Support, and fixed a bug where build status was being determined prematurely.
first set of small changes
Merge pull request #1 from vaneyckt/jsandrew-improvements-review

Jsandrew improvements review
Stop gathering the head repository from the pull request data - it's no longer necessary.
remove no longer needed require
use consistent spelling
improve config file help text
fix indentation
we're going to need octokit again
use slightly more specific string to split on
fix indentation
remove unnecessary break
add spec test for cloning repo when authenticated with oauth token
fix new_client method in github.rb
make github.rb spec tests go through both types of authentication
fix jenkins spec test
Merge pull request #2 from vaneyckt/jsandrew-improvements-review

Jsandrew improvements review
Merge pull request #31 from jsandrew/master

Adding GitHub enterprise support, GitHub OAuth Support, Cross-Repo Pull Request Support, and fixed a bug where build status was being determined prematurely.