launcher: customize default workspace

simplify center with only clock
left shows some ev standalone powerwidgets
right shows tips

Change-Id: I90a38a3b8ac095da48ca04c5b46ad9d393ecf0c5
launcher: EVTips widget is 4 wide.

Change-Id: I21656874d830801ed471de4ed9bd402af5e13f0f
Preferences: initial Preferences Activity, Provider and XML

Change-Id: Ib9e86d17ea5ea13e75a1de833ab1845eb7e8ecf6
Launcher2: add overflow menu in app drawer view for devices w/o a hardware menu key

  *needed by gnex to access launcher settings
  *based on http://review.cyanogenmod.com/#change,11217 by nebkat

Change-Id: I14f83b539b913cc4634fe05437427128b901202a
Launcher2: add hide search bar and auto-rotate from trebuchet

Author: nebkat <nebkat@gmail.com>
    [PATCH] Preferences: Hide search bar preference + others
Author: Danesh M <daneshm90@gmail.com>
    [PATCH] Preferences: Auto-rotate screen

Change-Id: I97f59d35247a8648f1559b1b59356af056c14464