Create CityOfAppsterdamMap.geoJSON

A geoJSON file which can be used and modified with locations in and around Appsterdam of interest to all.

Also see https://maps.google.com/maps/ms?msid=216133742875578647504.0004dded0a1baa38e053b&msa=0&ll=52.387335,4.907455&spn=0.068099,0.14883