Remove PointPointModel.yml dataset and use Base.yml instead

Simplify tests by sharing the same dataset for everything.
Merge branch 'master' into geojson
Add GeoJSON tests

* Add api.geojson.feature for functional API tests
* Add BoundingBox and Tile class unit tests
* Add some extra test data for points and geometries
* Add test step for array count in geojson response
Update gisconverter to add getGeoArray() fn needed by geojson code
Minor changes

* Move bounding box array building to BoundingBox class
* Fix BoundingBox::toGeometry()
* Fix geometries in GeoJSON by using new toGeoArray() fn
Tidy up Post and Point model tests - fix attr ID after change to dataset
Merge branch 'master' into geojson