Fix Rubinius build.  Update Rubinius label in .travis.yml.  Remove Gemfile.lock to allow testing with different VMs.  Add .ruby-version to .gitignore
Remove 1.8.7 option from .travis and remove the master only restriction, so PRs run Travis
Add Ruby 2.1.0
Merge pull request #49 from petergoldstein/feature/rbx_green

Make spec runnable on Rubinius