bson _id field

implement bson and unmarshaling from mongo debezium connector

Merge pull request paulmach#13 from rubenv/bbox-unmarshal

Make sure bounding boxes survive geometry unmarshalling

Merge pull request paulmach#13 from rubenv/bbox-unmarshal

Make sure bounding boxes survive geometry unmarshalling

fix readme badges

Merge pull request paulmach#5 from paulmach/id-interface

Feature.ID -> interface{}

add feature id tests

Merge pull request paulmach#3 from gojuno/fix-scan

Geometry can be scanned from string

geometry.Scan for direct postgis query -> geojson