zziplib provides read access to zipped files in a zip-archive,
using compression based solely on free algorithms provided by zlib.
zziplib provides an additional API to transparently access files
being either real files or zipped files with the same filepath argument.
This is handy to package many files being shared data into a single
zip file - as it is sometimes used with gamedata or script repositories.
The library itself is fully multithreaded, and it is namespace clean
using the zzip_ prefix for its exports and declarations.