Added class constructors, fixed Stripshader, added relative Tween example and updated Tween source.
New Group.destroy example and patched the desyrel font xml.
Merge branch 'gamepadsupport' of https://github.com/karlmacklin/phaser into karlmacklin-gamepadsupport

Conflicts:
	README.md
Brand new Gamepad API support fully implemented (thanks to Karl Macklin), with examples to show use.