[documentation] Mark `duration` argument in me.Tween constructor as optional.
[documentation] Mark `duration` argument in me.Tween constructor as optional.

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