Switched from font-awesome-sass-rails to font-awesome-rails

* Font-Awesome dropped core sass support in
  3.1.x. font-awesome-sass-rails is stuck on 3.0 and is unlikely to be
  kept up to date
* The font-awesome-rails tracks Font-Awesome core very closely.
* The font-awesome-rails gem works with Rails 4 and has a test suite

Closes #1651
Merge pull request #1662 from rmm5t/font-awesome-gem-switch

Switch from font-awesome-sass-rails to font-awesome-rails
Update jquery-rails dependency constraint
Update coffee-rails dependency constraint
Bump version to 0.4.9
Update query-ui-rails dependency constraint
Merge branch 'master' into rails-4

Conflicts:
	rails_admin.gemspec
Use sass-rails master

Workaround for 'File to import not found or unreadable: font-awesome' error
Fix incompatibility with JQuery UI v1.10. Closes #1668, Closes #1670.

Thanks to @vala and @xhj.
Also use sass-rails master for dummy_app
Merge branch 'master' into rails-4
Update Rails to 4.0.0.rc2
Replaced global selectors in $ function in rails_admin.dom_ready event handlers to narrower optional find() calls
Merge pull request #1671 from scarfaceDeb/scoped-dom_ready

Replaced global selectors in $ function in rails_admin.dom_ready event h...
Allow JRuby failures
fix name clash causing failures on nested-one/nested-many
fix name clash causing failures on nested-one/nested-many
Add generator option '--skip-devise' to skip devise installation
Rails 4.0.0 is out!
Create separate field types for richtext editors