Use local rAF instead of window.rAF
Merge pull request #5 from nordligulv/patch-1

Use local rAF instead of window.rAF
Remove redundant call to cleanValue

cleanValue (on a value) is called in update method so I think it should be removed here
Merge pull request #6 from nordligulv/patch-2

Remove redundant call to cleanValue
Fix example
Rebuild