Merge pull request #169 from englercj/dev

Update raf polyfill, fixes #112
Merge pull request #171 from englercj/dev

Add absolute positioning to the measure div
Update Utils.js

function wrapper on new polyfill causing pixi compile to fail
pad hex representation of color with leading 0s in PIXI.Stage.prototype.setBackgroundColor
Merge pull request #172 from jeremyawon/dev

Fix for iOS Safari not rendering some stage background colors