Add relative_url_root fallback for Rails 3.1 (fixes #96)
Add relative_url_root fallback for Rails 3.1 (fixes #96)

crowdbase/tinymce-rails,heaven/tinymce-rails,dziemian007/tinymce-rails,RakeshTejra/tinymce-rails,spohlenz/tinymce-rails,alexandred/localoids-tinymce-rails,crowdbase/tinymce-rails,ipmobiletech/tinymce-rails,alexandred/localoids-tinymce-rails,alexandred/localoids-tinymce-rails,heaven/tinymce-rails,spohlenz/tinymce-rails,RakeshTejra/tinymce-rails,prpetten/tinymce-rails,afar/tinymce-rails,ipmobiletech/tinymce-rails,afar/tinymce-rails,blenderbox/tinymce-rails,afar/tinymce-rails,dziemian007/tinymce-rails,prpetten/tinymce-rails,spohlenz/tinymce-rails,ChouAndy/tinymce-rails,RakeshTejra/tinymce-rails,ipmobiletech/tinymce-rails,ChouAndy/tinymce-rails,prpetten/tinymce-rails,ChouAndy/tinymce-rails,crowdbase/tinymce-rails,dziemian007/tinymce-rails,heaven/tinymce-rails,blenderbox/tinymce-rails