Rename engine spec file
Add relative_url_root fallback for Rails 3.1 (fixes #96)
Update references to Rails versions in README
Add README info about tinymce-4 branch
Add basic Travis CI configuration
Lock Capybara version to 2.0.x
Add Travis CI build status to README
Add Gemfiles for compatible Rails versions
Fix Gemfiles and sandbox for Rails 4 testing
Update specs and sandbox app config for Rails 4
Merge branch 'master' into tinymce-4
Update README with details about the tinymce-4 branch