[documentation] made the quadtree "private"
[documentation] made the quadtree "private"

gopalindians/melonJS,TukekeSoft/melonJS,srbala/melonJS,TukekeSoft/melonJS,rlugojr/melonJS,rlugojr/melonJS,gopalindians/melonJS,MarkoIvanetic/melonJS,srbala/melonJS,gopalindians/melonJS,melonjs/melonJS,rlugojr/melonJS,TukekeSoft/melonJS,MarkoIvanetic/melonJS,melonjs/melonJS,srbala/melonJS