Improved documentation of Game.update and Game.paint.
Improved documentation of Game.update and Game.paint.

ruslansennov/playn2,thecocce/playn-1,tinkerstudent/playn,playn/playn,rachelharvey/playn,longtaoge/playn,thecocce/playn-1,playn/playn,longtaoge/playn,rachelharvey/playn,ruslansennov/playn2,playn/playn,tinkerstudent/playn