v1.x-1.0.1

Bugfix and maintenance release, note that the update script needs to run.

• Issue #1: Add some documentation to README by @indigoxela in #2
• Issue #3: Implement hook_node_delete() and do some cleanup by @indigoxela in #4
• Issue #5: Add workflow for automated tests by @indigoxela in #6

Full Changelog: 1.x-1.0.0...1.x-1.0.1