set max zoom for map

[mapsam]

right now there are some unnecessary zoom events with L.markerCluster() that can be fixed by maxZoom

[mapsam]

so markerCluster seems to not have included a new update that spiderfys if the zoom is unecessary. There's a nice pull request in the markercluster repo that makes sure zoom is necessary and if it isn't spiderfy occurs. https://github.com/Leaflet/Leaflet.markercluster/pull/415

This needs to be updated in the source code for markercluster since it's not in their distribution version yet.

Here's the code to replace the _zoomOrSpiderfy function with:

_zoomOrSpiderfy: function (e) {
    var map = this._map;
    if (e.layer._bounds._northEast.equals(e.layer._bounds._southWest)){
      if (this.options.spiderfyOnMaxZoom) {
        e.layer.spiderfy();
    }
    } else if (map.getMaxZoom() === map.getZoom()) {
      if (this.options.spiderfyOnMaxZoom) {
        e.layer.spiderfy();
      }
    } else if (this.options.zoomToBoundsOnClick) {
      e.layer.zoomToBounds();
    }

    // Focus the map again for keyboard users.
    if (e.originalEvent && e.originalEvent.keyCode === 13) {
      map._container.focus();
    }
},