Add required gems for Rubinius.  Update gemspec to support JRuby.  Add both to .travis.yml
Add Rails 4.1.0.beta1, Ruby 2.1.0.  Allow failures on JRuby/Rails 4.1.0.beta1 combination because of outstanding issue on ActiveRecord JDBC driver
Merge pull request #8 from petergoldstein/feature/add_rbx

JRuby and Rubinius support in specs, Travis