Broken with Polymake 4.0

Each Polymake major version release comes with a lot of backward incompatible changes in the C++ interface. As a consequence, the code of PyPolymake needs a major rewrite to support a new version. And this rewrite makes it incompatible with previous Polymake versions. We should find a more viable way to have the Python interface compatible with Polymake.

Some options

• tie each pypolymake release to a single version of Polymake
• (optionally) move the project upstream so that it is tested together with Polymake changes so that new release of polymake has its pypolymake project ready

See also the discussion on the polymake forum.