Fixed the `me.Font` and `me.BitmapFont` implementation by extending the `me.Renderable` class
Fixed the `me.Font` and `me.BitmapFont` implementation by extending the `me.Renderable` class

That fixes the un-implemented `getBounds()` function (although this is
merely used since we removed the direct Rect implementation)

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