Have a web demo for all released version of MP

[farooqkz]

When a regression has happened, this feature could be useful to realize approximately when did it happen. When we realize since which version this happened, we can translate tag to commit. Then we can start to find regression easily with git-bisect.

[Simon-Laux]

ideally we would have enough tests that catch regressions before they happen

[farooqkz]

Regressions have happened in past. How do we get that ideal? Maybe a generator for test cases?

[Simon-Laux]

maybe by copying test suits from other similar projects