Accelerometer for HTML

Initial basic accelerometer for HTML deployments. Currently only pitch, roll, and azimuth, accessed through persistent AccelerometerOrientation instance, emitted from System.accelerometer.orientationUpdate. More features in the works for HTML version. Soon building Air/NME implementation. To be available to Flash in IE10/Windows RT down the road, likely by the time support is added to the browser. Drop a line if there are other Accelerometer/Flash capable browsers that need supported.