Update to TinyMCE 4.0b2
Rename engine spec file
Add relative_url_root fallback for Rails 3.1 (fixes #96)
Update specs for changes in TinyMCE 4
Merge branch 'master' into tinymce-4
Update README with details about the tinymce-4 branch
Add homepage to gemspec
Update TinyMCE to 4.0b3
Extract tinymce_configuration helper method
Update TinyMCE to 4.0
Remove Ruby 1.8.7 from Travis tests
Merge remote-tracking branch 'upstream/tinymce-4'

Conflicts:
	lib/tinymce/rails/version.rb
	vendor/assets/javascripts/tinymce/tiny_mce_popup.js
Added some files.