Trebuchet : default workspace

Change default screen to screen 0 (far left screen) to match
Launcher3. Clean up default layouts for various device types.

Also fix missing layouts for allAppsCling.

Update: Replace Books with Hangouts
Update: Clean and add non-GMS fallbacks
Update: Fix MMS being in sw70-non-telephony
Update: Cast checkitemplacement to long
Update: Layouts and avoid rounding issues for sw600dp

Change-Id: If0c3ad5ffcb8e2ee4b811251c0360f7512c31fdb
Trebuchet: Cleanup preferences

* Remove misleading summary from Homescreen settings. It says "Screens and wallpaper"
but there are no wallpaper settings inside. It also seems to be unnecessary,
removing it brings us inline with the rest of the preferences
* Remove unused string: preferences_interface_title
* Hide Drawer & Dock settings until we actually have some settings there.
Users freak out when they tap these preferences and nothing happens.

Change-Id: Iedd4c809a0a8fbf17e22a65b941fcd43e662da3f
Merge pull request #1 from CyanogenMod/cm-11.0

Cm 11.0