CM Tablet tweaks project (Ready for merge)

Since tablets handle various things differently than phones, it requires
some modifications on the framework. After a lot of discussion, i came
up with this todo list: http://kan.gd/3vb

Included features (in chronological order):
- Toggle status bar top/bottom via cm settings. Changes position on the
  fly when setting is toggled.
- Moved carrier and power notifications to bottom for bottom bar
  cannot make the notifications to appear aligned bottom. layout engine
  drives me mad. if you got a solution, please feedback.
- Created "Tablet tweaks" menu in cm-settings root to gather all tablet realted
  options in one place
- Extended power menu with home/menu/back buttons. toggable on the fly via cm
  settings
- Custom volume-long-press events (home/back/menu/call/end call/search/start-stop
  -music/next track/prev track/longpress home)
- Added same options for both-volume-buttons press and long-press (not fully implemented yet)
- Fixed status bar xml, so soft buttons now appear as big as the .png file is.
- Solved issue about soft buttons not clickable. Their size is now determined
  smart by the real size of the buttons
- Added option to move soft-buttons left or right
- Added submenu to choose which soft buttons to display.
- Added Quick-Notification-Area-Soft-Button - instantly opens/closes notification
  area since swiping it open is a long way on tablets
- Added a Dead-Zone option, so the middle of the status bar is not clickable.
  Happend a lot before people click it when trying to hit space
- Added option to toggle extended power items
- Added option to reverse power button behavior (switch short-press with long-press action)
- cleaned up the options and created new submenus
- complelty rewrote volume button handling
- integrated Drakknars great new design and wrote code for it
- added option to disable lockscreen
- added option to disable fullscreen
- disable ticker notifications if softbuttons enabled
- added hdpi icons for resized statusbar via overlay for vega and encore
  this way, status bar items dont look blury anymore
- added search button to list of soft-buttons - its off by default
- added long-press to home, back and search soft-button
- extended fullscreen handling: when a fullscreen app is running, an additional
  hide-softbutton is displayed. once pressed, the app gets real fullscreen
- added option to choose unhide button for fullscreen
- improved hide-button handling for special situation, like app-starting-app
  (i.e. astro file mananger starting movie player, which does fullscreen request)
- bugfix phase #1 - fix all known bugs but volume key handling (needs big rewrite)
- bugfix phase #2 - removed volume remapping for cm7stable, because source of too many
  possible bugs considering all the uses of volume buttons + lockscreen disable + reverse
- code cleanup - moved most stuff to Cm classes (CmSystem, CmPhoneWindowManager,
  CmStatusBarView, CmButtonTracker) - am satisfied with the code now
- improved fullscreen overriding in Window class. not only setFlags, but also setAttributes
  is intercepted now
- modified stock AndroidTerm to not crash anymore with our new fullscreen handling
- further improved fullscreen handling after all feedback i got. RC2 and probably merge
  ready code - although i still have to re-insert the trailing spaces

Thanks to Samuel Halff <samuelhalff@gmail.com>, who not only inspired
all this, but also did a first version of bottom status bar. Without
his initial work on the Status Bar and on the CM-Crew (telling this is
absolutly needed), this patch wouldnt exist.
Also thanks to the Nook Color community, where all those options were
discussed.

All graphics done by Stefano Pignataro (Drakknar@XDA) - again, awesome work mate (:

Settings part of this patch: http://review.cyanogenmod.com/4206

You can find Samuel's original patch here:
https://github.com/samuelhalff/android_frameworks_base/commits/gingerbread

You can find his thread from xda where this is discussed here: http://kan.gd/3vd

Change-Id: I51816a89a2c64ac0a83a377ea5f91a40d6fdd703