new may syntax in r5

r5 requires new metadata for the textual representation of the map:
https://build.fhir.org/mapping-language.html#metadata

The Java parser supports currently 

```
/// url = 'http://hl7.org/fhir/StructureMap/CodeSystem3to4'
/// name = 'CodeSystemR3R4'
/// title = 'R3 to R4 Conversions for CodeSystem'
```

the tutorial maps have to be updated accordingly