Added WS.wake() to wake up the display, when used with WS.activityCreate()

 You can now create scripts that start the Glass display when it is off and even restart your activity if it is closed.  Thanks @lnanek for the tip on how to do this (I tried wakelocks before but I didn't get it to work properly).  Closed #64

Signed-off-by: Brandyn White <bwhite@dappervision.com>