Start html mockup markup and styling
Add dummy open category folder
Add transition to opening 4th item
Setup rendering through views
Merge branch 'master' into chore-markup-and-styling

Conflicts:
	app/assets/javascripts/backbone/initializers/product_categories.js.coffee
	app/views/products/index.haml
Setup Views for category rendering
Build UI using views and some mock data
Render products