Added marker at coordinates in the url

Addresses issue #782

overviewer_core/data/js_src/overviewer.js

@@ -41,7 +41,12 @@ overviewer.collections = {
         /**
          * holds a reference to the spawn marker. 
          */
-        'spawnMarker': null
+        'spawnMarker': null,
+	
+	/**
+	 * if a user visits a specific URL, this marker will point to the coordinates in the hash
+	 */
+        'locationMarker': null
     };
 
 overviewer.classes = {

overviewer_core/data/js_src/util.js

@@ -91,6 +91,10 @@ overviewer.util = {
 
             compass.render();
             spawnmarker.render();
+            if (overviewer.collections.locationMarker) {
+                overviewer.collections.locationMarker.setMap(null);
+                overviewer.collections.locationMarker = null;
+            }
 
             // update list of spawn overlays
             overlayControl.render();
@@ -555,5 +559,7 @@ overviewer.util = {
 
         overviewer.map.setCenter(latlngcoords);
         overviewer.map.setZoom(zoom);
+        var locationmarker = new overviewer.views.LocationIconView();
+        locationmarker.render();
     }
 };

overviewer_core/data/js_src/views.js

@@ -556,3 +556,22 @@ overviewer.views.SpawnIconView = Backbone.View.extend({
     }
 });
 
+overviewer.views.LocationIconView = Backbone.View.extend({
+    render: function() {
+        // 
+    if (overviewer.collections.locationMarker) {
+        overviewer.collections.locationMarker.setMap(null);
+        overviewer.collections.locationMarker = null;
+    }
+    overviewer.collections.locationMarker = new google.maps.Marker({
+        'position': overviewer.map.getCenter(), 
+        'map':      overviewer.map,
+        'title':    'location',
+        'visible':  false,
+        'animation': google.maps.Animation.DROP
+    }); 
+    overviewer.collections.locationMarker.setVisible(true);
+
+    }
+});
+