added sql table index's to Tracks, index's of playlist_id and user_id. Also indexed Playlist with user_id index.
added votes test model with fixtures, started working on voting game module and realized i need to create another model called groups so that a group can have an array of users ids. This will give me more flexibility to add a gaming mechanic. Certain playlist can belong to groups and then the user will not feel restricted to either private playlist or playlist that are relevent to the gaming model
cleaning up branch and moving to an appropriate branch for larger changes
created groups, and built associations with playlist and friends with has_many operator :through