Spine iOS runtime based on C

My implementation supports

DarkColor tint (except two color clipping)
Lazy Atlas TextureLoading
correct pma version normal blending
- official version does not correct vertex color in pma version
correct blending mode in non-pma version
- non-pma version color blending is not correct in official version

Neat, I might steal your fixes for (non-)PMA!

Added Support for Atlas settings (Atlas filter, wrap, mips)
which was ignored in official version