Fixed JDBC connection issues
-Added persistence unit name to entityManager config in context.xml
-Changed EntityManager instantiation from manual to Spring injected.
-Removed all references to em.getTransaction() since Spring should now
be managing the transactions.
-Removed BaseDAO.  Completely unneccessary.
-Added password field to PUT demo page (still need to implement
functionality).
-Various cosmetic fixes to UI on that page.
-Added Default constructor to DemoUserVO object (required for
XmlRootElement annotation.
-Changed Table and column references for id and user tables to be quoted
as hibernate was somehow getting confused and couldn't find the
appropriate table and column.  Perhaps 'user' is a postgres keyword?