Projector with mobile screens

Hi,

I noticed something while trying to make the plugin work on a mobile device. 
The Projector.js class uses Scene.sys.game.config (l. 79) to get the width and height of the game. It would be more accurate if the projector used Scene.sys.game.canvas.

However I think this issue only appears in a browser in debug mode. It should work fine on the actual device.