Changelog:

[*] Launcher2: Improve launcher app launching performance (http://review.cyanogenmod.org/#/c/20842/)
[*] Trebuchet: Fix NPE when rotating (http://review.cyanogenmod.org/#/c/22535/)
[*] port Wallpaper Hack (http://review.cyanogenmod.org/#/c/27326/3)
[*] Remove wallpaper offset (http://review.cyanogenmod.org/#/c/23612/)
[*] Only mark preferences changed when they actually are (http://review.cyanogenmod.org/#/c/24032/)
[*] Fix preference casing (http://review.cyanogenmod.org/#/c/24276/)
[*] Fix for NPE in showAllAppsCling (http://review.cyanogenmod.org/#/c/25490/)
[*] Fix desktop alignment when Search Bar is hidden (http://review.cyanogenmod.org/#/c/27186/)
[*] LauncherModel: Fix possible NPE (http://review.cyanogenmod.org/#/c/27483/)
[*] Update wallpaper offsets to match hack for recent (http://review.cyanogenmod.org/#/c/27549/)
[*] Make sure wallpaper gets redrawn to avoid ghost (http://review.cyanogenmod.org/#/c/27624/)
[*] Workspace: Quad interpolator (http://review.cyanogenmod.org/#/c/28077/)
[*] Workspace: Don't set wallpaper visibility with hack (http://review.cyanogenmod.org/#/c/28249/)

Credits: ErwinP and his device tree for htc_buzz, and for backporting these
         commits from jellybean. (https://github.com/ErwinP/android_device_htc_buzz/tree/ics/patches)

Change-Id: I93587d8dbf072dd4b9cfbd3be4587d16329a7ae0