[ Bryce Harrington ]
* Enable 227_null_ptr_midispcur.patch to apply

[ Chase Douglas ]
* Update to xserver 1.12.1 for the input stack
* Drop patches merged upstream in 1.12.1:
  - 501_touch_accept_end.patch
  - 502_indirect_touch_window_set.patch
  - 503_fix_mouse_warp.patch
  - 504_implement_passive_touch_ungrab.patch
* Fix patch 506_touchscreen_pointer_emulation_checks.patch after upstream
  review
* Fix various touchscreen issues (LP: #974887)
  - Add temporary patch 506_touchscreen_fixes.patch, which is a combination of
    multiple upstream patches