Added the "Up" button on the ActionBar for all Activities
Made all Activities (except Settings) share the same ActionBar
Fixed small piece of code that leaked some memory
Created dedicated Activity to listing songs, according to a ArrayList<Songs>
Made possible to see all songs by artist and by album
Now when you go to the Artist submenu, if he has more than one album the album list will be shown.
Finally, we can play songs via a user-defined nowPlayingQueue
Made the MediaController work a little better
Now the ActionBar title reflects user navigation through Albums and Artists
Dynamic "Now Playing" item on the MainMenu and when a music finishes, it automatically plays the next
Fixed Last.fm support