Threedigrid

---------------------

- Add extra field `pixel_width` to cells

- Bugfix for GeometryIntersectionFilter: filter was only checking on
intersecting bounding boxes

---------------------

- The `sample` method needs to skip the last timestamp for SWMR
to work correctly. (time dataset can have one item more
than datasets with timeseries)

---------------------

- Bugfix: reprojection with no coordinates (empty array's)

-------------------

- Added `GeometryIntersectionFilter`.

- Added general GeoJsonSerializer which allows you to specify the field names
you want to serialize and extract to geojson. The GeoJsonSerializer allows
you to specify nested fields.

- Added a set of standard export fields for each model.

- Automatically pick the correct serializer based on file extention

- .json/.geojson --> to_geojson
- .gpgk --> to_geopackage
- .shp --> to_shape

---------------------

- Minor bugfix, need to check if h5py filepath is a str or bytes string
during initialization

-------------------

- First release with RPC integration.