running

- tried to write Fuzzer but again failed to really create useful queries

- tried to create Fuzzer
- refactored model structure

added a lot of openEHR reference model stuff
fixed bugs

added openehr model classes

still has to tidy up a lot
at least most test cases except the cypher transformations work again

test cases do not succeed at the moment, just an intermediate checkin

added test cases

refactored aggregator operators and nested queries

added further testcases
added partial support for valuesets
added filtering within retrieves

fixed absolute path to fhir profiles file
fixed POM

instead included aql-parser directly into the project