[#600] more accurate frame duration in the `requestAnimationFrame` polyfill
[#600] more accurate frame duration in the `requestAnimationFrame` polyfill

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