Port forward CmCircleBattery to StatusBar options (2/2)

This is a port from CM (http://goo.gl/h8cce) by Sven Dawitz
(sven@dawitz.de)

For ThinkingBridge this replaces the existing CircleMod with the new CM
implementation
which uses 100% Java (as opposed to ~600 PNGs for all possible battery
states).
While the original CM mod allowed a user to select whether the battery
percentage
should be displayed inside the circle, I have removed this option to
more
directly replace our existing CircleMod. That option should be easy
enough to
add back in if we decide we prefer it.

You can view Sven's example screenshot at http://goo.gl/3KGbY

Signed-off-by: htchoi1995 <htchoi1995@gmail.com>
Author: Sven Dawitz <sven@dawitz.de>