prepare release version 3.1.0-beta1
bugfixing
prepare next development version version 3.1.2-SNAPSHOT
Merge branch 'develop' of git@github.com:Caleydo/org.caleydo.datadomain.mock.git into develop
prepare release version 3.1.2
prepare next development version version 3.1.3-SNAPSHOT
Merge branch 'develop' of github.com:Caleydo/org.caleydo.datadomain.mock into develop

Conflicts:
	META-INF/MANIFEST.MF
	pom.xml
prepare release version 3.1.3
prepare next development version version 3.1.4-SNAPSHOT
prepare release version 3.1.5
Merge tag 'v3.1.5'

releasing 3.1.5