Added with_track option (-t <branch>) to remote_add
Removing ruby-prof from the gemfile (problems with cext)
updating .travis.yml
Merge branch 'patch-1' of git://github.com/gabriel-cardoso/ruby-git into gabriel-cardoso-patch-1
Merge branch 'develop' into gabriel-cardoso-patch-1
Adding :track => <branch_name> and :fetch => true option to add_remote
Adding tests too
closes #40