support added for Source field in RSS

feed.go

@@ -17,6 +17,7 @@ type Author struct {
 type Item struct {
 	Title       string
 	Link        *Link
+	Source      *Link
 	Author      *Author
 	Description string // used as description in rss, summary in atom
 	Id          string // used as guid in rss, id in atom

rss.go

@@ -90,6 +90,7 @@ func newRssItem(i *Item) *RssItem {
 	item := &RssItem{
 		Title:       i.Title,
 		Link:        i.Link.Href,
+		Source:      i.Source.Href,
 		Description: i.Description,
 		Guid:        i.Id,
 		PubDate:     anyTimeFormat(time.RFC1123Z, i.Created, i.Updated),