Removing forced JUnit dep.
update different plugins to newer version, most have now (minimal)
support for m2e
update config of build-helper-maven-plugin to also work with m2e
Merge pull request #8 from imod/master

update plugins to have better m2e support
[maven-release-plugin] prepare release jenkins-1.27
[maven-release-plugin] prepare for next development iteration
org.jvnet:animal-sniffer is obsolete.
[maven-release-plugin] prepare release jenkins-1.28
[maven-release-plugin] prepare for next development iteration
Explain what a developer needs to do.

Why is less relevant. What to do is more important
[maven-release-plugin] prepare release jenkins-1.29
[maven-release-plugin] prepare for next development iteration
latest and greatest
Merge branch 'master' into no-junit-dep