TinyMCE for projects

Related to Pivotal Tracker story *Mercury Editor for projects description* https://www.pivotaltracker.com/story/show/64507678.

[TinyMCE editor](http://www.tinymce.com/) for project description in new/edit form, using [tinymce-rails gem](https://github.com/spohlenz/tinymce-rails). My solution for initialization under Turbolinks is probably clumsy - feedback appreciated. It also takes away some of the flexibility of TinyMCE configuration and only allows the default layout specified in config/tinymce.yml.

To see it in action: http://websiteone-nga.herokuapp.com/projects/websiteone/edit.
as a matter of fact, I was thinking of removing `Turbolinks` entirely. Adds additional complexity and saves us nothing really. It works in very unintuitive ways, and many if not all of the publicly available Javascript snippets out there will need to be modified to work with `Turbolinks`. I am already making it a point to remove `Turbolinks` in any new Rails application, shall we do the same to WSO? thoughts?