PNG libraries

[BCS]

Reply to Stewart,

> The other one I've noticed is Lodepng, which was written in C++ but
> has been ported to D.  It supports a small handful of ancillary
> chunks, but still doesn't provide access to any chunks it doesn't
> understand or even preserve them between loading and saving.
> 
[...]
> 
> (b) Improve one of the libraries such as Lodepng.  I don't know to
> what extent that would work.

If you'd like to take a crack at that I'll give you SVN access to scrapple 
so you can.