Add basic-level gamma calibration to hardware tunables

Change-Id: I3223cb111889be71175dee67723ae44cba051e23

Conflicts:
	res/values/cm_strings.xml
	src/com/android/settings/DisplaySettings.java
	src/com/android/settings/cyanogenmod/BootReceiver.java

Conflicts:
	res/values/strings.xml
	res/xml/more_device_settings.xml
FIX MERGE
Network speed

Change-Id: Ib120d424b3b86b83bb58383c458d1746d865b371

Conflicts:
	res/xml/tool_bar_settings.xml
	src/com/android/settings/cyanogenmod/Toolbar.java