Added helpers for encoding colors into shader format.
Added helpers for encoding colors into shader format.

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