Replace Nova Launcher with SlimLauncher

Change-Id: I33ff3fbd5b178d77230abaee14ca2958386a36fe
Merge remote-tracking branch 'slimroms/kk4.4' into kk4.4

Conflicts:
	config/common.mk

Change-Id: I86ddbdcbede587015ed0ed7db986465c415ab911