* Revised PNG palette optimization
* Added some debug logging in coders/png.c.
* More precise blur values for Lanczos2Sharp and LanczosSharp.
* Added location of first Mitchell crossing (=8/7) to the filters data
structure.
* Added Lanczos2D* filters now named Lanczos2*
* Reorganization of AcquireFilter() to make it work better
* Clearer EWA filters (LanczosSharp etc) comments.
* Added LanczosSharp (3-lobe Lanczos with sharpening)
* Filter sharpening factors are also always applied regardless of usage.
* CubicBC filter formulas simplified by constant folding. In
particular, P1 coefficient (always zero) removed from coeff.
* Revert the Robidoux filter to a Keys cubic with C=(108 sqrt 2-29)/398
(as already specified in the documentation).
* Ignore PS bounding box offsets if -page is set.
* Add support for -evaluate exp.
OBS-URL: https://build.opensuse.org/package/show/graphics/ImageMagick?expand=0&rev=47
