Hide stretch implementation detail in Antialias.c
two ImagingStretchHorizaontal pass with two transposes
Precompute coefficients for all x
Iterate pixels in native order
move ww into coefficients
make x indexes int
faster float to 8bit convertion
optimize memory usage
speedup by unrolling loops
fix performance regression on 64 bit GCC 4.8.
typo. Free mem after ModeError.
Test for endianness issues in stretch
Fix for endianness issues in stretch
generalize endianess test
two bands case
Replace UINT32 assignment with per-channel UINT8 assignment
fix typo
Move ImagingTransposeToNew from Antialias.c to Geometry.c
Merge pull request #977 from homm/fast-stretch

Imaging.stretch optimization
Update CHANGES.rst [ci skip]