D bindings to libpng.
Seems suitable for inclusion into the larger set of bindings offered by the Deimos project.
These bindings were miticulously created by hand, based on the C headers from libpng version 1.6.17 - March 26, 2015.
The repo is following the usual 'dub' structure, but you don't need 'dub' to use it. You can simply copy the libpng folder to your import path.