missing jdom dependency?

[yingshou guo]

After check out the main trunk and run mvn command, the following build
error occurs:

java/gadgets/src/main/java/org/apache/shindig/gadgets/FeedProcessor.java:[53,41]
cannot access org.jdom.Document
class file for org.jdom.Document not found
      SyndFeed feed = new SyndFeedInput().build(new StringReader(feedXml));

I need to add jdom dependency to java/gadgets/pom.xm to successfully build
shindig.