Set and TreeMap are using reverse order

``` java
System.out.println(Set.set(Ord.intOrd, 1, 2, 3)); // Prints Set(3,2,1)
System.out.println(TreeMap.<Integer, String> treeMap(Ord.intOrd)
    .set(1, "a").set(2, "b").set(3, "c")); // Prints TreeMap((3:c),(2:b),(1:a))
```

Set and TreeMap should use ascending order rather than descending.
