Squashed commit of the following:

commit 52b55fdde886b7c20ba3308152f077baf763e7a2
Merge: f6e2b31 6f637ee
Author: Tom Dunlap <tom@roadtrippers.com>
Date:   Mon Dec 30 20:55:46 2013 -0500

    Merge branch 'master' of https://github.com/hungrymedia/simple-bar-tab into hungrymedia-master

    Conflicts:
    	Gemfile
    	Gemfile.lock
    	app/assets/javascripts/page_specific/line_items_form.js.coffee
    	app/controllers/tabs_controller.rb
    	app/models/line_item.rb
    	db/schema.rb

commit 6f637ee6050cbb6bbd123454f22e84ab7f3a3af7
Author: Warren Harrison <warren@hungry-media.com>
Date:   Sun Dec 29 14:28:39 2013 -0500

    Limit access to signed in users.
    Add user to tab/line_item views.

commit 85e449b3ed5bb1032a59d33005b07b8d3167ad4f
Author: Warren Harrison <warren@hungry-media.com>
Date:   Thu Dec 26 19:41:46 2013 -0500

    Add devise to app. Login with username, instead of email address.