Parallel arrays in lookup
Avoid extra dereference
Flexible array in hashtable
Assert max colors
Flexible array in colormap
merge configure

fixes #87
adds better build configuration, some feature detection, and more
remove unsafe float optimizations flags

removes -ffast-math and only readds flags set by it with impact on performance.
slightly increases accuracy, makes results consistent across compilers, and
reduces differences between 387 and sse fp math.
silence gold linker warning when building with icc

fixes #89
typo and comment edit
Fixed -framework flag
minor configure changes
Hint what to do when it doesn't compile
Automatically use LCMS if available
Fall back to __SSE__
Help when libpng is missing
Mark
honour option to disable cocoa

As the variable is set to 1 to enable and 0 to disable it will always
be defined.
Merge pull request #93 from keis/optional-cocoa

honour option to disable cocoa
Avoid single colours to dominate the MSE calculation by limiting their perceptual weight to a maximum of 10% of the image surface.
Merge pull request #94 from rolftimmermans/quality-color-dominance

Avoid single colours to dominate the quality calculation