Bookmarks: Add owner bookmark pages (~{user}, ~{user}/feed).

Change-Id: I04395a6454d8c187e23683db72100f49b80fc655
diff --git a/src/main/java/eu/mulk/mulkcms2/benki/users/User.java b/src/main/java/eu/mulk/mulkcms2/benki/users/User.java
index 71f6c43..6587ec4 100644
--- a/src/main/java/eu/mulk/mulkcms2/benki/users/User.java
+++ b/src/main/java/eu/mulk/mulkcms2/benki/users/User.java
@@ -137,4 +137,8 @@
   public String getFirstAndLastName() {
     return String.format("%s %s", firstName, lastName);
   }
+
+  public static User findByNickname(String nickname) {
+    return User.find("from BenkiUser u join u.nicknames n where ?1 = n", nickname).singleResult();
+  }
 }