Release 2020.15.0

• Implement Generic JsonLogic Controller
  
  The JsonLogic-Controller is a very generic Controller that allows the definition of a complex logic as a configuration at runtime, e.g. via Apache Felix Web Console. It is based on the JsonLogic specification.
  
  
• Refresh docs and screenshots. See docs and Github Readme
• Improve DefaultConfigurationWorker
  
  NOTE: Use the DefaultConfigurationWorker to simplify appling default configurations on your deployments – like always setting up a Backend.Api.Controller.

https://github.com/OpenEMS/openems/releases/tag/2020.15.0