- changed compiler to accept two additional required parameters "inputGrammar" and "inputRos2Rag"
- update ros2rag grammar according to latest draft
- begin with parser (missing resolving amongst others)
- parsing in test kind of fails because of leading comment

- added relations that would be generated
- added methods for convenience dependency specification
- added parameter "writeCurrentValue" to connect methods of write definitions (not always wanted, thus optional)
- split method to update token-NTA in update (which now flushes) and write (using saved last value)
- cleanup of unused code