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?

On runtests.sh you use backticks instead of cipher.
You should read this http://stackoverflow.com/a/33301370
In your case it shouldn't matter because it's so simple, but it's a good idea to always use ciphers instead for ``best practice''.

I also get errors from ar and ranlib when compiling.
``plugin needed to handle lto object''