[gimp] (14 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:

  3e00e2c... app: make levels config request linear colors
  4c58f32... app: make curves tool pick in linear
  25a321a... operations: make brightness-contrast, levels and curves ope
  17d52b4... app: brightness-contrast scale contrast around 50% gray
  7500678... app: default many created gimp_histograms to linear
  382be4a... app: unconditionally promote image to linear 32bit floating
  9e473c8... app: dither floating point result on load if original is 8b
  6a993ae... png: add a combo-box for specifying png bitdepth/variant
  22ac7fd... app: hide advanced color options
  d0e2672... app: do not let pixel encoding determine layer modes
  67990ec... app: duplicate normal mode, one linear and one sRGB
  42173d1... app: add more non-linear/linear alternative layer modes
  5a85c9d... XCF: add new linear layer modes
  2a80dda... app: normalize some alpha/opacity handling of some layer mo