.) Added an option to force the use of the PlaySoundFile() API function.
   Using this option to play music has the following benefits:
	+ With this option it is possible to play custom music again until PlayMusic() is fixed for files not included in the WoW client 
	+ Music will not stop after a loading screen
   but also some drawbacks: 
	- Music played via PlaySoundFile() can not be stopped 
	  (The stop button will act as a mute button until the currently playing music has elapsed, then the player will stop)
	- Selecting a song from the playlist will put in a queue to be played after the currently playing song
	- You will not hear ambient sound while the music is playing 

.) Added a new GUI skin. This is now the default for new installations




