Distributable wheel

[cosmosgenius]

Hey,
So we forked yara-python as we needed to build wheels for linux and mac. We were able to to build wheel using the manylinux docker packages and natively on mac (build.sh)

For the final setup we ran auditwheel on the generated wheels in linux, which worked fine.
While running delocate for the mac wheel, openssl from homebrew was not delocated due to issue

Would it be possible to move yara-python.c into a yara package and the yara submodule to yara-src (or something similar)?

I can open a PR for the same and possibly for wheel builds if its ok