* Merge from Debian testing, remaining Ubuntu changes:
  - debian/patches: 
    + xubuntu-use-notification-icons.patch: use our notification-* icons
      for notification bubbles instead of the normal ones LP: #437374
    + xubuntu-assume-hal-is-available.patch: do not check for hal presence
      on the bus, it'll be spawned automatically on demand. lp: #507097
    + 10_pc.patch: added patched files to POTFILES.skip
    + series: created, with these two patches
  - debian/rules: add --with quilt
  - debian/control: build-depends on quilt (>= 0.46-7~)
  - debian/README.source: added.
* debian/patches/01_check-brightness-array-icon-index.patch,
  02_handle-weird-negative-brightness-level.patch: dropped, included
  upstream.