[gtk] (7 commits) ...Merge branch 'ebassi/cell-renderer-get-size' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  3eaebf1... Port GtkCellRendererPixbuf to preferred size vfuncs (*)
  a605fcc... Port GtkCellRendererSpinner to preferred size vfuncs (*)
  71a9e5d... Port GtkCellRendererToggle to preferred size vfuncs (*)
  20f9e0f... Port GtkCellRendererProgress to preferred size vfuncs (*)
  ac47328... Port CellRendererGraph to preferred size vfuncs (*)
  60a7830... Remove GtkCellRendererClass.get_size() (*)
  8cf4ce5... Merge branch 'ebassi/cell-renderer-get-size' into 'master'

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