More search improvements - a "Where am I?" link that does a reverse

search, and various cleanups to the previous changes.

app/views/site/index.rhtml

@@ -102,6 +102,10 @@
     handleResize();
   }
 
+  function getPosition() {
+    return mercatorToLonLat(map.getCenter());
+  }
+
   function setPosition(lat, lon, zoom) {
     var centre = lonLatToMercator(new OpenLayers.LonLat(lon, lat));