o Use hashtable for named property list group-links rather than co-located
  regular named property links.
o Property lookup modified for named properties to deal with hashsets when
  present.
o makeHS2 now gets passed in an optional function to unlink entries when
  they are removed from the hashset.  It is stored and threaded around.
o freeLL2 gets an optional unlink function to use to unlink freed entries.
  (for use by HS2 using the LL2)
o Pair keys are now const, and the string versions are now const char *.
  That had to change in a number of places.
o Minor bug fix in fprintPropsHS2
o debugPropsHS2 added to easily debug dump a named property list in gdb.
whitespace cleanup: remove only 4 lines with tabs in crsx.[ch]
Add basic memory management infrastructure (LINK/UNLINK) for struct _Properties.
Merge branch 'develop' of /home/morris/work/ctmap2/crsx into develop
More reference counting for property lists.
Add LINKs for property lists on the way in.
Add UNLINKs for free variables in property links and the _Properties struct
overall onthe way out - in freeTerm.
Passes all tests and uses less memory.