- Concurrency fixes and fixes to handling of 0/1 entry palettes
- do not pre-equalize XYZ conversion matrices for sRGB
- internal clean-ups
- pre-define ACES2065-1 and ACEScg BablSpaces
- add R~G~B~ set of spaces, which for all BablSpaces mean use sRGB TRC
Signed-off-by: Pierre-Yves <pyu@riseup.net>