1.0c Made it namespace safe.  Module names are clipped from the front.
1.0b hash method renamed to hashtable
1.0a
1.0  Minor fixes: writeable attributes weren't being stored in the
     particular class, they were being stored globally.
     DBBackedClass.count returned String, now it's Fixnum.  Where clauses
     changed to generic modifier clauses.
0.9  Added partial caching to classes.  Simply use the hashed_cached class
     method in the class definition.  All accesses where an instance is
     lookup up by record_id will go through the cache.  fetchAll() does
     not and backrefs do not as there is no way to know how complete the
     cache is.
0.8a Fixed DBIAccessor.{insert,update} to use the constructed argument
     list for the SQL params.
0.8  Added random and count class methods.  Added installer.
0.7b Added counting to DBBackedClass.  Added Time field support.
0.7a Fixed it so that if you instantiate a class and then add a bunch of
     new backref elements, and then flush, it works.
0.7  Initial release
