This reverts commit
82195e28e3d9f733216f364d20719b213367515f.
The HCY extensions is not ready for use, since the model does not provide
symmmetric conversions. Disabling build and install of it.
pippin@yogi:~/src/babl/tests$ BABL_PATH=../extensions/.libs ./models
HCYA
test: 0.713 -0.170 -0.020 0.033
clipped: -0.505 6.011 -0.259 0.033
trnsfrmd: 137.334 -0.503 10.838 0.033
HCYA
test: 0.335 0.130 -0.029 -0.066
clipped: 0.335 0.130 -0.029 -0.066
trnsfrmd: 0.335 0.130 -0.029 -0.066
HCYA
test: 0.455 0.145 0.287 0.409
clipped: 0.455 0.145 0.287 0.409
trnsfrmd: 0.455 0.145 0.287 0.409
HCYA
test: 0.689 -0.154 -0.011 0.077
clipped: -0.413 3.381 -0.223 0.077
trnsfrmd: 55.965 -0.372 4.757 0.077
HCYA is not symmetric
HCY
test: 0.713 -0.170 -0.020 0.033
clipped: -0.505 6.011 -0.259 1.000
trnsfrmd: 137.334 -0.503 10.838 1.000
HCY
test: 0.335 0.130 -0.029 -0.066
clipped: 0.335 0.130 -0.029 1.000
trnsfrmd: 0.335 0.130 -0.029 1.000
HCY
test: 0.455 0.145 0.287 0.409
clipped: 0.455 0.145 0.287 1.000
trnsfrmd: 0.455 0.145 0.287 1.000
HCY
test: 0.689 -0.154 -0.011 0.077
clipped: -0.413 3.381 -0.223 1.000
trnsfrmd: 55.965 -0.372 4.757 1.000
HCY is not symmetric