Add support for CMHome (1/2)

Add permission for DashClock extensions.
Change Trebuchet to allow viewing additional screen.
Add setting that to configure Google Now / CMHome.

Change-Id: I63286a2cce87455ed411bd4c77680200eec89be7
Merge branch 'cm-11.0' into kk_mkt

Conflicts:
	AndroidManifest.xml
	src/com/android/launcher3/Workspace.java
	src/org/cyanogenmod/trebuchet/CustomHomeLauncher.java
	src/org/cyanogenmod/trebuchet/TrebuchetLauncher.java
	src/org/mokee/launcher/MoKeeLauncher.java

Change-Id: I1b83e2a9f286f2b3092e1646fa163eb1a1a16d50