New Mac build error: bliss fails to build

[rpgoldman]

I have filed an issue upstream but it's disturbing that the version of bliss in cpddl is quite old compared to upstream.

For now, I have been running the grounder inside a docker container, but this is unsatisfactory, because it is prone to losing error messages, etc. when I run it inside a shell script. So any suggestions would be very welcome.

[galvusdamor]

Basically, we need to get Dan Fiser to update this code. And then - we as a next step need to update our code as his current version has a different API to what we were expecting.