Upgraded to rails4.  Removed coffeescript.
Removed intellij files from being tracked.
Updated environment configuration for rails4 - removing deprecated configuration entries and adding new ones based on http://dev.mensfeld.pl/2013/06/upgrading-to-rails-4-0-from-rails-3-2-test-case-part-i-preparations-configuration-gems/.
Removed deprecated 'whitelist_attributes' configuration property.