Updated readme to show custom cocos2d-x setup.
Updated readme to show custom cocos2d-x setup.


Former-commit-id: d4a20dcd29fadd2082cb79fe722fa8c60ad16d80
NatWeiss/RGP,NatWeiss/RGP,NatWeiss/RGP,NatWeiss/RGP,NatWeiss/RGP,NatWeiss/RGP,NatWeiss/RGP,NatWeiss/RGP