Support for multivalued Geofield field

Please Test and QA ...
Would be (soo) nice to approve and create a new Views GeoJSON release with this, to provide a more extended and strong support for the Drupal Geofield module → .
Thanks!

just a further refinement, so to generate a GEOMETRYCOLLECTION only if more than one Geofield values, otherwise just use the first Geofield value (GEOMETRYCOLLECTION needs at least 2 sub features, otherwise Geojson is not valid, apparently).
The generated Geojson looks valid now on my side, on top of multivalue Geofields ...

Ready for QA and Review.

Thanks @itamair!
Working in basic testing. Merged to 1.x-dev.

Credit where credit due!

Automatically closed - issue fixed for 2 weeks with no activity.

Included in 8.x-1.4.