use an annotation processor instead of a groovy script because of classloading issues

src/main/java/com/commafeed/backend/dao/FeedDAO.java

@@ -103,6 +103,7 @@ public class FeedDAO extends GenericDAO<Feed> {
 
 	}
 
+	@XmlRootElement
 	public static enum DuplicateMode {
 		NORMALIZED_URL(Feed_.normalizedUrlHash), LAST_CONTENT(Feed_.lastContentHash), PUSH_TOPIC(Feed_.pushTopicHash);
 		private SingularAttribute<Feed, String> path;

src/main/java/com/commafeed/backend/model/UserSettings.java

@@ -10,6 +10,7 @@ import javax.persistence.JoinColumn;
 import javax.persistence.Lob;
 import javax.persistence.OneToOne;
 import javax.persistence.Table;
+import javax.xml.bind.annotation.XmlRootElement;
 
 import org.hibernate.annotations.Cache;
 import org.hibernate.annotations.CacheConcurrencyStrategy;
@@ -21,14 +22,17 @@ import org.hibernate.annotations.CacheConcurrencyStrategy;
 @Cache(usage = CacheConcurrencyStrategy.TRANSACTIONAL)
 public class UserSettings extends AbstractModel {
 
+	@XmlRootElement
 	public enum ReadingMode {
 		all, unread
 	}
 
+	@XmlRootElement
 	public enum ReadingOrder {
 		asc, desc
 	}
 
+	@XmlRootElement
 	public enum ViewMode {
 		title, expanded
 	}