Removes obsolete class.
Fixes create/delete databases.

Remembers created databases in a meta-collection.
Fixes create/delete collections.
Adds reactive MongoBufferedWriter.
Fixes Transactions
Adds support for metadata collection caching.
Finalises the conversion between GeoJSON and BSONDocument formats.
Clean up of unused code.
Adds CrsId Json Reads.
Simplifies GeometryReads
Adds support for crs definitions in feature stream.