Update gems
Update to rails 4.0.1
Do not require guard-rspec in development
Add multiple discs template to album form

Interation to be added later.
Use ActiveRecord:Aggregations for granular dates
Return nil from granular date when all units are nil
Begin frontend migration to Ember.js
Remove coffeescript
Remove haml
Update gems
Rename page#home view
Update to handlebars 1.1.2
Delete underscore.js

No need for this with ember.
Mock artist form
Show memberships on artist page
Remove jquery_ujs
Show siblings on edition page
Show tracklist on editions page
Format track duration
Add csrf token header to xhr