Remove empty controller_helper file
Fix bug when indexing a null user's name
Change format of Project end date in form and params
Create UserAction model for logging
Create association between UserAction and other objects
Rename UserAction#object -> #subject

There was a naming collision with Ruby's object_id attribute on all
objects.
Log project events
Log attributes on project update
Log group approvals and rejections
Log comment creation
Log contribution actions
Log group creation & deletion
Log project update creation
Create PageView model
Create a user attribute on page views
Log all page views
Log User ids in page view table
Merge remote-tracking branch 'origin/pageviews' into alpha

Conflicts:
	app/controllers/application_controller.rb
	app/controllers/approvals_controller.rb
	app/controllers/groups_controller.rb
	app/controllers/projects_controller.rb
	db/schema.rb
	spec/controllers/groups_controller_spec.rb
	spec/matchers/log_user_action_matcher.rb