v2.0.0-rc1

This bundle features:

• The new GraphQL engine documented here
• A nice landing screen when starting the server
• Improved support for RML2
• Jar file can now be launched with java -jar rpt-VERSION.jar because the necessary --add-opens declarations are part of the included manifest.
• Lots of additional testing; work in progress is to add selftest commands to verify the rpt bundles.

You can install this release with docker using docker pull aksw/rpt:2.0.0-rc1