Add rubinius compatibility
Cache bundler
Require rubysl on rubinius
Merge branch 'master' into rubinius
Upgrade Capybara
Fix a couple test errors

The StandardError with expects seems to be the reason for failure,
changed it to mock fixed it
Fix all tests

- Use an anonymous test sinatra class in the test to avoid any possible
  name clash
- The original impl doesn't play nicely with Rubinius, super call seems
  to get into an infinite loop. I am sure this is probably a bug of
Rubinious, in the meantime using delegate pattern (always favor
composing over inheritance) seems to work
Remove an unnecessary let
Try to fix build
Try again
Ignore Gemfile.lock
Try specifying rubysl in Gemfil
Do not test coverage with Rubinius
Do not test coverage for feature as well
Merge pull request #148 from codegram/rubinius

Ensure rubinius compatibility