[WIP] SlimPIE (2/2)

Ported from CM sources by @cristianomatos

Change-Id: I10e026e76748b1e273d38a983ea873a7076b124d

Conflicts:

	proguard.flags
	res/values/cr_arrays.xml
	res/values/cr_attrs.xml
	res/values/cr_strings.xml
	res/xml/system_ui_settings.xml
	src/com/android/settings/crdroid/SeekBarPreference.java