Use inheritance for maven surefire plugin. specify version with pluginManagement.
Should resolve #24: We call no deploy goal on a release.
specify default goal for maven. now we could build with simple "mvn" command.
Raise min-version of maven to 3.1.0
Update for several maven plugins
Use latest release plugin for releases
#5 let itests start their http-servers on a random free port so they can run in parallel