OpenLayers.Layer.GeoRSS GeoRSS layer. Pass a name and location of a GeoRSS file on the web, and a marker will be added to the map for each item in the GeoRSS feed. Uses OpenLayers.loadURL to load the XML, parses the data, and adds markers to the map. * Constructor OpenLayers.Layer.GeoRSS(name, url) -- Name and location of GeoRSS XML file. * Methods parseData(ajaxResponse) -- none -- Callback for the loadURL call. This function parses the XML for the GeoRSS feed, creating markers for the data and adding a popup to each marker. It populates an array of features as 'this.features'. markerClick(Event) -- none -- Action to perform when a marker is clicked. clearFeatures() -- none -- Removes all features and markers from the map.