• Update to 1.15
• Pass maintainership to submitter

Short changelog:

• Black preservation on CMYK-> CMYK transforms
• Ability to set adaptation state of observer on absolute colorimetric transforms.
• A rather advanced feature. Actually it only allows No adaptation (d=0) and observer fully adapted (d=1)
• lcms can now "fix" some broken 8-bit profiles that have gray axes misplaced.
• icctrans can now read CGATS/IT8 files.
• improved tifficc with tiff Lab8 support

PR: ports/101603
Submitted by: Stanislav Sedov <ssedov(at)mbsd.msk.ru>
Approved by: krion (mentor)