getTilt, getShakeProperties/setShakeProperties need units in documentation

[Google Code Exporter]

> return values: {interval, intensity}

Need to specify, in what units will be interval and intensity

> return values: JSON - {x, y, z}

Need to specify in what units x, y, z

Original issue reported on code.google.com by incredible.angst on 9 Sep 2011 at 12:29