Updated melonJS to 1.0.0-dev

Here is the pull request, but before you accept it, just be sure you understand that this is not a public version of melonJS yet and that this is a development build.

here is the list of changes :
https://github.com/melonjs/melonJS/wiki/Upgrade-Guide

This also brings so many improvements including audio on mobile device.
https://github.com/melonjs/melonJS/blob/1.0.0-dev/CHANGELOG

your call and how you feel the most comfortable with :)