Added Ogg Vorbis file support and improved overall sound file loading code.
No longer using wifstream for file input - switched to ifstream instead because the former was too slow.

Signed-off-by: martingronlund <martingronlund@live.se>
Now with blues and roggan! (Numpad 0-2 to play)

Signed-off-by: martingronlund <martingronlund@live.se>