[gtk] (9 commits) Non-fast-forward update to branch ebassi/new-a11y

[Emmanuele Bassi <ebassi src gnome org>]

The branch 'ebassi/new-a11y' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  fc02c6f... Add GtkAccessiblePropertySet
  d20af2f... Allow setting the accessible role at construction
  e438e7e... Plumb all the GtkAccessibleProperty values into GtkAccessib
  c03f5ed... Add accessible properties to GtkAccessible
  e934db8... a11y: Add roles to various widgets
  32989d1... a11y: Update the "pressed" state on toggle buttons
  94e84b1... a11y: Update the accessible state for GtkRange
  1905acd... a11y: Set the role for GtkScale
  58a683b... a11y: Update GtkSeparator

Commits added to the branch:

  173c917... Allow setting the accessible role at construction
  0580c3e... Plumb all the GtkAccessibleProperty values into GtkAccessib
  0c9a9b7... Add GtkAccessiblePropertySet
  8ba9055... Add accessible properties to GtkAccessible
  feaf38e... a11y: Add roles to various widgets
  ae28485... a11y: Update the "pressed" state on toggle buttons
  84762e2... a11y: Update the accessible state for GtkRange
  d41fbe8... a11y: Set the role for GtkScale
  237d305... a11y: Update GtkSeparator