Drop dependency on capybara
Add travis-ci config
Add gemfile for rails 3.2.x
Stop tracking test cache files
Add support / tests for Rails 4.0

Resolves issue #28
Add tests for Rails 4.1

Resolves issue #29
Drop rails version from gem description
Upgrade vendored assets to CodeMirror 4.3
Bump gem version for release
Upgrade vendored assets to CodeMirror 4.4
Bump gem version for release