Upgrades the TinyMCE version to 3.5b3
Merge pull request #57 from johnloy/upgrade-tinymce-jquery-to-3.5b3

Upgrade TinyMCE version to 3.5b3
Fix specs
Update to TinyMCE 3.5
Extract TinyMCE init code into separate helper method (closes #59)
Rename rake task file otherwise it can't see same named file sprockets-rails gem (moved out in rails 4.0.0beta)
Merge pull request #60 from nexneo/master

Rename rake task file for compatibility with rails 4 beta
Include helper module when ActionView is loaded (fixes #54)
Allow JS function strings to be passed as TinyMCE options (fixes #62)
Explicitly cast configuration values to string before checking if JS function (#62)
Upgrade to TinyMCE 3.5.2
Update to TinyMCE 3.5.4.1
Updated to TinyMCE 3.5.5
Update to TinyMCE 3.5.6
Clarify TinyMCE asset inclusion in README
Update Rakefile

update Rakefile to not fail when using ruby 1.8 where force_encoding is not valid
Merge pull request #73 from rgc/patch-1

Fix rake:update in Ruby 1.8
Upgrade to TinyMCE 3.5.7
Use latest Rails for running specs
Add support for multiple configurations (closes #63, #74)