[cheese] (12 commits) ...Merge branch 'videobalance'

[Filippo Argiolas <fargiolas src gnome org>]

Summary of changes:

  59dd8dd... Add a videobalance to the pipeline (*)
  43d5794... Add a first draft of a brightness widget (*)
  8098dbd... Add gconf brightness property (*)
  c8c1f7e... Store brightness in gconf (*)
  3a65610... Rework Preferences dialog (*)
  2381720... Make balance widget more generic (*)
  876ea9d... Implement contrast control (*)
  cb8a8ec... Implement saturation control (*)
  0e5c676... Set default values for "unset" gconf keys (*)
  c158ba6... Implement hue control (*)
  b36b6c9... Use new scale marks to revert sliders to default (*)
  9fc46c6... Merge branch 'videobalance'

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