[gnome-control-center] (14 commits) Non-fast-forward update to branch gbsneto/background

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

The branch 'gbsneto/background' 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:

  3bebfe2... background: Turn into a template class
  8cdbb7b... background: Make BgSource receive a GtkWidget
  a200fc9... background: Introduce CcBackgroundChooser
  e40c7e7... background-panel: Remove background chooser buttons
  5e4495b... background: Cache thumbnails in CcBackgroundItem
  0f2424d... background: Switch to GtkFlowBox
  4b73a8e... background: Remove CcBackgroundChooserDialog
  74eed4f... background: Use the cairo_t provided by GTK
  0d7c5ea... background: Move preview to CcBackgroundPreview
  041540f... background: Use widgets to render slideshow emblem
  bcf7b45... background: Introduce BgRecentSource
  fd4dc52... background: Manage recent backgrounds
  472bbe6... background: Remove dead code

Commits added to the branch:

  da7e0fc... background: Turn into a template class
  4d43a92... background: Make BgSource receive a GtkWidget
  1725547... background: Introduce CcBackgroundChooser
  d24f05e... background-panel: Remove background chooser buttons
  5ec0037... background: Cache thumbnails in CcBackgroundItem
  59da75e... background: Switch to GtkFlowBox
  d293047... background: Remove CcBackgroundChooserDialog
  a111919... background: Use the cairo_t provided by GTK
  96b4d18... background: Move preview to CcBackgroundPreview
  08e5d36... background: Use widgets to render slideshow emblem
  f68117d... background: Introduce BgRecentSource
  43b80a7... background: Add recent backgrounds
  36cecde... background: Add "Open Picture..." header button
  d69f688... background: Remove dead code