framework: Battery bar (1/2)

Patch Set 1:    * initial release
Patch Set 2:    * minor code cleanup

SCREENSHOT: http://i.imgur.com/JSnr5tn.png

Change-Id: I4f0d65a4b9673a63ed44a32619c1dba882f5e9ea
Merge pull request #5 from benjamingoodwin/cm-10.1

framework: Battery bar (1/2)