[gimp] (10 commits) Created branch pippin/linear-is-the-new-black

[Øyvind Kolås <ok src gnome org>]

The branch 'pippin/linear-is-the-new-black' was created.

Summary of new commits:

  5e29e56... app: do not let pixel encoding determine layer modes
  07ce9d9... app: duplicate normal mode, one linear and one sRGB
  e1158a8... app: unconditionally promote image to linear 32bit floating
  4a06903... app: dither floating point result on load if original is 8b
  917e482... app: make levels config request linear colors
  5163f55... app: make curves tool pick in linear
  c016f00... operations: make brightness-contrast, levels and curves ope
  3009b20... app: default many created gimp_histograms to linear
  7bba937... app: hide advanced color options
  3d05fd0... png: add a combo-box for specifying png bitdepth/variant