added volume option to the play method
added volume option to the play method

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