[gimp] (18 commits) Non-fast-forward update to branch wip/pippin

[Øyvind Kolås <ok src gnome org>]

The branch 'wip/pippin' 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:

  c201b99... app: do promotion to float by default in default settings
  6f2b219... app: make levels config request linear colors
  f7d9720... app: make curves tool pick in linear
  0cca1f4... operations: make levels and curves operate on linear data
  d83c062... app: default many created gimp_histograms to linear
  a641cab... app: hide advanced color options

Commits added to the branch:

  c043ffd... Update Polish translation (*)
  3df24ff... Update Catalan translation (*)
  5e7d9d8... Bug 772785 - Quit dialog should exit when all the images in (*)
  79a0ca5... app: "shift" property in tiling was to be soft-limited by i (*)
  7e702ad... app: turn all members of GimpSettingsBox into properties (*)
  da70cc7... app: make GimpFilterTool always have a container of recent  (*)
  b734586... Bug 769550: recommend recent GTK+ on Windows with working k (*)
  8fee058... app: fixing 2 argument type build warnings. (*)
  b8a04c5... tools: add invert-svg in the DISTCLEANFILES. (*)
  dddcdb4... configure: work around a bug in AX_PROG_CC_FOR_BUILD... (*)
  9b500c0... app: initialize generated properties with their default val (*)
  3c0cffe... app: add GimpFilterTool::set_config() (*)
  5113f12... app: do promotion to float by default in default settings
  f1da20d... app: make levels config request linear colors
  d5c4962... app: make curves tool pick in linear
  2c5fcda... operations: make levels and curves operate on linear data
  8772035... app: default many created gimp_histograms to linear
  9792feb... app: hide advanced color options

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