moved does_url_belong_to_user? method from controller to model
before_filter on ShortUrlsController and fixed tests
fixes for merge request
use Devise's built in before_filter :authenticate_user!
check for current user existence in does_url_belong_to_user?
Merge branch 'wcmc-next' into wcmc-next-short-url

* wcmc-next:
  Only allow @unep-wcmc.org emails to register
  Require users to confirm their email addresses
  Use visit ordering scope in ShortUrls display
  Scope to order ShortUrls by visit count

Conflicts:
	app/models/short_url.rb
Update short_url.rb

&& in place of and
Merge branch 'wcmc-next-short-url' into wcmc-next-new-ui
views reorganisation