libzahl - big integer library

http://git.suckless.org/libzahl/tree/
The rationale for its creation can be found on the README file.
What do you think?

suigin's wip is finished!
hebimath is looking good.
https://github.com/suiginsoft/hebimath

I notice that both hebimath and libzahl have bechmarks.
https://github.com/suiginsoft/hebimath/tree/master/bench
http://git.suckless.org/libzahl/tree/bench

Couldn't maandree and suigin work together to unify benchmarking?

maandree's benchmarking strategy can be found on the page 17 of his document "Representing and working with almost none of the integers the suckless way" [0]

[0] http://libs.suckless.org/libzahl-paper-1.pdf