GeoJson: Add factory methods to create Geometries from primitive arrays

[ivovandongen]

When using the geojson classes from jni, there is a performance hit as all factory methods are now neatly typed. For example: MultiPolygon#fromCoordinates(List<List<List<Position>>> coordinates). This means creating multiple nested arrays of Position objects and turning all of those into Lists. This is great from Java, very messy from jni.

Let's add methods like: MultiPolygon#fromCoordinates(double[][][][] coordinates) (already lost count of the []'s)

cc @zugaldia