Auto-paginate the Repos list

- Some people have greater than 30 repos and would like to see all of them ;)
Add first spec around GithubUtils
Improve normalize_user and test get_user_details_for
Spec out the last of GithubUtil's public methods
Merge pull request #146 from jasnow/master

Rebuilt Gemfile.lock file (uglifier)
Merge pull request #135 from sigmavirus24/feature-auto-paginate-repos

Auto-paginate the Repos list
Avoid bootstraping Rails application during compilation, avoid heroku precompiling assets issue.
Add rails_12factor gem.
Config assets for production (heroku)