HashTable with destructor comments

not suitable for production use, but saved in case I need to use
debug in the destructor moving forward
functional HashTable class

implemented the destructor for the hash table.  See the
HashTable_with_debug for a chatty version with destructor
feedback as it works through the node table.
TreeSet & HashSet implemented

Ready for more rigorous testing after I read the spec carefully
to make sure all the functions correctly meet reqs.