Feature/multiprocessing

For faster matrix generation
I wouldn't worry about version numbering. With the changes you submitted recently, I was planning to make a new "1.2.0" release to pypi. So we could squash all these changes into that release.

I have also notified two other downstream developers about changes, I will wait for a short time for their response. If I get nothing, I will ignore their changes in the release.

If you personally have any other ideas to put into that release, it might be an idea to submit the ideas as issues so I can organise them into a release. It makes things easier to follow ;)

btw: In my packages I like following semver.org