Add files to make the no-database emberjs app work. Placed all javascript in app.js.coffee for now.

Fixtures for static emberjs plus some style tweaks.
Added Post model and creation of 2 sample records.
Updated to fetch data from database and persist changes. Added controller and serializer for posts, and resource for posts in routes.
Persistence working, including delete button, and cancel when making a new post.
Need to get callback or else route is set to null.
Details here: https://github.com/emberjs/data/issues/405
Rails 4 on Heroku. Change to Postgres. Add some Heroku gems. Add Proc File for Puma.