Clean up code and add README
Merge branch 'clean-up'

Conflicts:
	.DS_Store
	app/assets/javascripts/collections/items.js
	app/assets/javascripts/models/item.js
	app/assets/javascripts/views/cards/card_show.js
	app/assets/javascripts/views/items/item_show.js
	app/assets/templates/items/show.jst.ejs
	app/views/layouts/_header.html.erb
	app/views/static_pages/root.html.erb
	config/routes.rb