Create a xmlsec-binary package

[visuman]

I have been using python-xmlsec for a while now, and I always create a .whl with xmlsec present in it as it's much easier to use.
And over the last 1 year, I've had multiple issues with building this .whl file because of some system dependencies and version conflicts.

It would be great if we can have xmlsec-binary.

Somewhat like how the pysqlite3 project does it:
https://pypi.org/project/pysqlite3-binary/
https://pypi.org/project/pysqlite3/

Or
https://pypi.org/project/psycopg2/
https://pypi.org/project/psycopg2-binary/

I believe this would be really helpful for a lot of folks .

[mxamin]

Duplicate #245.
We're gonna continue in #316.