clean slate for 1.0.pre.4
Make /library default route; basic sidebar/panel structure with dummy templates
Define view classes for library and playlist

Provides elements and classes needed for styling
Add player template and view
Load content for library controller via model hook
Render library content
Add playlist controller and render playlist content in template

note: no way to put albums into playlist yet
Add queueAlbum action to router; wire up to album template
Display track list in album view

note: original project designed to use shared album template
that conditionally hides tracklist, add, remove links
Add computed property for playlist tracks
Add currentTrack property; set on first album queued, last dequeued
Add currentAlbum property to playlist controller
Add styling for currentTrack and currentAlbum in the UI
Add dequeue action
Add prev and next actions
Add audio element and complete player controller actions