CIE Lab based delta E algorithms should allow specifying a specific CIE Lab variant (D50 vs D65, etc.)
We imply based on our references that all the CIE Lab algorithms are based on Lab D65, but CMC and 94 were using D50. Fix this inconsistency. If people want D50, we've now exposed ways to do this on demand or by setting it as the default.
CIE Lab based delta E algorithms should allow specifying a specific CIE Lab variant (D50 vs D65, etc.)
We imply based on our references that all the CIE Lab algorithms are based on Lab D65, but CMC and 94 were using D50. Fix this inconsistency. If people want D50, we've now exposed ways to do this on demand or by setting it as the default.
Resolve #361