Adding Util object
Dynamic test loading with assurances, a la Scenery
Adding isArray test
Moving over isArray into Util
Moving clamp => Util
Moving rangeInclusive to Util, bugfix for rangeInclusive, adding rangeExclusive
Moving toRadians to Util, adding toDegrees
Converting to 'scenery'-style requirejs usage. Removed unneeded files. Added compiled unit tests