CM11 Themes: Add feature for new themes.

Change-Id: I0da30606534c13a43de33bef08f79fbbb1b348d3
Merge "CM11 Themes: Add feature for new themes." into cm-11.0
Merge branch 'cm-11.0' of git://github.com/CyanogenMod/android_vendor_cm into cd-4.4

Conflicts:
	config/themes_common.mk

Change-Id: If680fe214fd16dd220c6c99ca35727f0570b5713