[gnome-control-center] (9 commits) ...display: Various style fixes

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

Summary of changes:

  faaf402... display: Re-indent cc-display-config.h (*)
  32be5bd... display: Add signal to monitor notifying about position cha (*)
  199a711... display: Add new arrangement widget and hook it up (*)
  e17e9da... display: Remove unused old display arrangement code (*)
  6fa9368... display: Remove incorrect comment (*)
  08a7f7c... display: Move output utility functions into CcDisplayMonito (*)
  d54c356... display: Enable infinit snapping when arranging two monitor (*)
  9a4449d... display: Implement major/minor axis snapping and infinit fo (*)
  02f0353... display: Various style fixes (*)

(*) This commit already existed in another branch; no separate mail sent