Reverse order in addAll(List,Cons).

This causes the elements of the list to match the original order they were
added to the cons list (which stores elements "backwards").

This order matters for joins, as Ray discovered.

src/main/java/com/samskivert/depot/Query.java

@@ -683,11 +683,13 @@ public class Query<T extends PersistentRecord>
         return new Cons<T>(head, tail);
     }
 
+    // note that because new elements are prepended to the cons list, we turn them into a Java list
+    // in reverse order, which matches the original order in which they were "appended"
     protected static void addAll (List<QueryClause> toList, Cons<? extends QueryClause> cons)
     {
         if (cons != null) {
-            toList.add(cons.head);
             addAll(toList, cons.tail);
+            toList.add(cons.head);
         }
     }