- Hash returns unsigned
- FixedList templated on unsigned int
- include uLabel.H in UList, HashTable etc. so the output function is know
  throughout

- added STL-compatible resize() method.
  Should this be the primary entry point?

- made [DS]LListBase end iterators private

because I failed to work out how to merge Mark's stuff -- HELP!!!

Added replace() method to DLListBase.
Modified the dictionary merge code to avoid scrambling the order, but left the old version active for now.