Create favorite join table
Add bootstrap css and js
Click on star shows popover or favorites track
Override bootstrap form layout
Create LoginModalView
Create SignupModalView
Don't create another modal if one already exists
Fix issues with header re-rendering
Create FavoriteView
Instantiate loginModalView and signupModalView on page load
Skip popover until it's fixed
Add unique index for favorites
Add commented validation in favorite.rb
Move displayError to modal views
Change icon when favoriting
Scope css in tarck.scss
Attach favorited_tracks to current_user's json and store them in a Backbone model
Refactor player class and load a track on first page load
Create Favorites bckbn Collection of Tracks objects
Massive refactoring of front-end (using backbone events now)