Updated patch against revision 4178; obsoletes all older patches.

Can *please* someone apply the patch (created with svn diff in the
source root directory) and commit it?  My sourceforge account is not
fixed yet, I can't do it myself.  IMO, we *should* get going with the
compatibility-with-current-Python issue.

The round.anypy package is added in setup.py.  The hashlib compatibility
is tested thoroughly, and if anyone considers it necessary, I can
provide a test for anypy.sets_, too.  Since "set" is a builtin type, I
renamed the "set" boolean variable in hyperdb.py to "do_set".