added in option for volume in playTrack
added in option for volume in playTrack

melonjs/melonJS,rlugojr/melonJS,srbala/melonJS,srbala/melonJS,gopalindians/melonJS,TukekeSoft/melonJS,Smoss/Enoru-eco,rlugojr/melonJS,TukekeSoft/melonJS,rlugojr/melonJS,Smoss/Enoru-eco,MarkoIvanetic/melonJS,melonjs/melonJS,MarkoIvanetic/melonJS,srbala/melonJS,gopalindians/melonJS,gopalindians/melonJS,TukekeSoft/melonJS