[maven-release-plugin] copy for tag v0.8.0

[maven-release-plugin] copy for tag release/0.7.0

[maven-release-plugin] copy for tag release/0.6.0

Minor refactorings

[maven-release-plugin] copy for tag release/0.5.0-rc3

[maven-release-plugin] copy for tag release/0.5.0-2

[maven-release-plugin] copy for tag release/0.5.0

- Removed the parts that were moved to the external plc4x-build-tools…

… repository.

[maven-release-plugin] copy for tag release/0.4.0

[maven-release-plugin] copy for tag release/0.3.1