mp++ 1.0.0

[bluescarni]

NOTE: with release 1.0.0, mp++ transitions to a semantic versioning numbering scheme.

This is a maintenance release that features a few bugfixes and introduces ABI versioning. There are no API changes with respect to the previous release (0.27).

As usual, the full changelog is available here:

https://bluescarni.github.io/mppp/changelog.html

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This discussion was created from the release mp++ 1.0.0.