- replaced 'spatialDatum' with 'spatialReferenceSystem' in JSON
- represent spatial reference systems in ISO using RS_Identifier
- support for named, EPSG, and WKT spatial reference systems
- updated full example with all supported reference system types
- change version name to 0.7.0
Merge branch 'dev' of https://github.com/adiwg/mdTranslator into dev