stb_image_resize2-d v1.0.1

[Guillaume Piolat]

GitHub: https://github.com/AuburnSounds/stb_image_resize2-d
DUB: https://code.dlang.org/packages/stb_image_resize2-d
Original header: 
https://github.com/nothings/stb/blob/master/stb_image_resize2.h

- Same API and features as original stb_image_resize2.h the 
evolution of stb_image_resize.h
- Making it thefastest image resizer in D (200 mpps) AFAIK
- About 150kb of binary size, so larger than stb_image_resize.h 
by about 90kb
- Quite low memory requirements (<10% of image size normally)
- Better quality than original with eg. the 
STBIR_FILTER_MKS_2013_86 and STBIR_FILTER_MKS_2021 kernel