Added GeoRSS support

Supports basic GeoRSS with latitude/longitude fields.

lib/rss.js

@@ -23,6 +23,8 @@ function RSS (options, items) {
     this.managingEditor = options.managingEditor;
     this.webMaster      = options.webMaster;
     this.ttl            = options.ttl;
+    //option to return feed as GeoRSS
+    this.georss         = options.georss || false;
     this.items          = items || [];
 
     this.item = function (options) {
@@ -35,6 +37,8 @@ function RSS (options, items) {
             categories:     options.categories || [],
             author:         options.author,
             date:           options.date,
+            lat:            options.lat,
+            lng:            options.lng,
             enclosure:      options.enclosure || false
         };
 
@@ -101,6 +105,12 @@ function generateXML (data){
         ifTruePush(item.author || data.author, item_values, { 'dc:creator': { _cdata: item.author || data.author } });
         ifTruePush(item.date, item_values, { pubDate:      new Date(item.date).toGMTString() });
 
+        //Add lat and long if GeoRSS is true.
+        if(data.georss){
+            ifTruePush(item.lat, item_values, {'geo:lat': item.lat});
+            ifTruePush(item.lng, item_values, {'geo:long': item.lng});
+        }
+
         if( item.enclosure && item.enclosure.url ) {
             if( item.enclosure.file ) {
                 item_values.push({
@@ -129,14 +139,22 @@ function generateXML (data){
 
     });
 
+    //set up the attributes for the RSS feed.
+    var _attr = {
+        'xmlns:dc':         'http://purl.org/dc/elements/1.1/',
+        'xmlns:content':    'http://purl.org/rss/1.0/modules/content/',
+        'xmlns:atom':       'http://www.w3.org/2005/Atom',
+        'version': '2.0'
+    };
+
+    //only add namespace if GeoRSS is true
+    if(data.georss){
+        _attr['xmlns:geo'] = 'http://www.w3.org/2003/01/geo/wgs84_pos#';
+    }
+
     return { rss: [
-        { _attr: {
-            'xmlns:dc':         'http://purl.org/dc/elements/1.1/',
-            'xmlns:content':    'http://purl.org/rss/1.0/modules/content/',
-            'xmlns:atom':       'http://www.w3.org/2005/Atom',
-            version: '2.0'
-             } },
-        { channel: channel }
+        { '_attr': _attr },
+        { 'channel': channel }
     ] };
 }