[2/4] omnigears: custom brightness support

screenshots:
http://www.mediafire.com/view/c4o6i5hfcowj2/screenies#2v66f7gy03ffqvq

PS2:
whitespace cleanup

PS3:
disabled level split and remove
I hardly believe anyone will ever need this

PS4:
moved general brightness settings from display into our fragment
string changes

PS5:
rename and license fixup

PS6:
typo

PS7:
PS6 broke the build, the ' needs to be escaped.

Change-Id: I9bb9b2d07af0726b68d2abda22e12f3b922e4aaf