[babl] (8 commits) Non-fast-forward update to branch wip/pippin/inverted-cmyk

[Øyvind "pippin" Kolås <ok src gnome org>]

The branch 'wip/pippin/inverted-cmyk' 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:

  5a0eac5... use inverted components in CMYK extension
  39b3ae7... add more proper cmyk extension
  b8c1cd2... cmyk: register model conversions to/from cmykA
  877b77c... lcms experiments
  085345f... lcms / icc integration for cmyk
  9185821... babl-space: add babl-rgb like sRGB with linear TRC
  d0f850c... babl-icc: create double transforms to/from babl-rgb when lo
  da04f7d... reference: some cmyk based to rgb based formats go through 
  4c98fa1... docs: fix typo

Commits added to the branch:

  cc594ca... docs: fix typo (*)
  6bc0c93... release 0.1.60 (*)
  da4d046... post-release version bump (*)
  80172b9... build: check for and link against lcms2
  1f529d1... babl: implement own reference code paths for CMYK color spa
  f995b12... extensions: replace naive-CMYK with new CMYK extensions
  68a28f8... babl: comment out unused model_is_rgba
  2c9783f... docs: update with information about CMYK

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