Merge branch '236-create-a-bugfix-release' into 'master'

Resolve "Create a bugfix release"

Closes #236

See merge request !166

setup.cfg

 [metadata]
 name = vre-language
-version = 0.3.0
+version = 0.3.1
 author = The Virtmat Tools Team
 author_email = virtmat-tools@lists.kit.edu
 description = VRE Language