Bumping Ruby version to 2.1.2
Fix for rbenv loading in .profile and .bashrc
Adding some rbenv unit test coverage
Adding Ruby 2.1.2 to TravisCI

We could also add 2.1.1, 2.1.0, etc.
Heh, removing trailing comma in tests for old Rubies
Excluding Puppet 2.7, 3.0 from Ruby 2.1.2 in the matrix

These fail for reasons beyond our control (as far as I can tell)