anchor.diff:  
         defaultCenter: [49, 12],
         defaultZoom: 5,
  +      markerSize: 10,
         minLineWeight: 2,
         maxLineWeight: 5,
         minLineOpacity: 0.3,
  
positive.code:       buildOrganisationPin: function(organisation) {
          var marker = L.marker(new L.LatLng(organisation.lat, organisation.lng), {
            icon: new L.DivIcon({
              iconSize: new L.Point(6, 6)
            })
          })
          .bindPopup('', {
  
negative.code:         $.each(organisations, function(i, organisation){
            var marker = L.marker(new L.LatLng(organisation.lat, organisation.lng), {
              icon: new L.DivIcon({
                iconSize: new L.Point(this.markerSize, this.markerSize),
                className: 'leaflet-div-icon faded'
              })
            });
  