Add documentation for the examples displayed in the readme page

[ELePors]

We should add documentation to open GeoView with KML or Shapefiles as displayed in the readme home page

[LabordePierre]

This example comes from an external project here: https://github.com/labordep/GeoViewMoreExamples, so not supported by GeoView.
I think we need to think how to adress KML/ShapeFiles features before.