Version 4.0.0 released and merged to trunk

[benfortuna]

Note that as of release 4.0.0 the master (and develop) branches now reflect the latest v4.x changes.

If you do not want to migrate to v4.x yet, ensure that you use the 3.x-maintenance-branch for any builds, forks and testing.

We will continue to support v3.x for now, so feel free to contribute pull requests but ensure you base it on this branch.