New sorting method: Random

Signed-off-by: Eduardo Lima (Etrunko) <eblima@gmail.com>
Randomize Playlist entries too

Signed-off-by: Eduardo Lima (Etrunko) <eblima@gmail.com>
Merge pull request #121 from etrunko/random

Add new sorting method: Random
Updated MPlayer to MPlayer-SB53.
See http://www.spirton.com/mplayer-mencoder-subjunk-build/ for changelog.