Add a screen to allow changing project owner, description

Signed-off-by: Shawn O. Pearce <sop@google.com>

appjar/src/main/java/com/google/gerrit/client/reviewdb/Project.java

@@ -65,6 +65,13 @@ public final class Project {
     protected void set(int newValue) {
       id = newValue;
     }
+
+    /** Parse a Project.Id out of a string representation. */
+    public static Id parse(final String str) {
+      final Id r = new Id();
+      r.fromString(str);
+      return r;
+    }
   }
 
   @Column