First draft of home screen
FIX IndexOutOfBoundsException in TrackQueue.get(clbk)

TrackQueue.requestTracks(trials): When the playlist comes to the end of its tracks and the server reloads it
with the same tracks, the mNextPtr is reset to 0.
Updates playlist db fields
FIX display of available playlists

Available remote playlists are now displayed in the "Available playlists" ListView in
SoloPlaylistsActivity.
But: onClickListener is not working. Clicking on a playlist causes a Force Close.