Started modifiying the product form to validate with JSON and return the correct error messages.
Merge branch 'master' of https://github.com/Jellyfishboy/trado

Conflicts:
	app/assets/javascripts/administration.js.coffee
	app/assets/stylesheets/administration.css.scss
	app/controllers/admin/products_controller.rb
	app/views/admin/products/new.html.haml
	db/development.sqlite3