Fix error with undefined active track position
Fix top margin for tracklist
Change tracklist renderign strategy, using css3 transform instead top to position track in tracklist
Create an app/query module to perform queries on appstate
Rename models to values
Convert all static track functions to a methods
Convert all groups static functions to a methods, use general isEmpty function
Create a cursor value to manage sliding window in large lists
Move a group fetching query to the corresponding module
Optimize tracklist rendering, disable groups loading