bind-with-multiple-calls-per-event-type.py: new, or forgot to add earlier

pickle.py: new low-level persistency module (used to be called flatten)
dbmac.py: stupid dbm clone for the Mac
anydbm.py: generic dbm interface (should be extended to support gdbm)

instead of individual components; initmodule3() now has doc string
argument as well

(a) support import NAME.NAME...NAME;
(b) support doc strings in modules, classes and function definitions

	use new instancebinop interface

	instancebinop, to support things like Rational * float; added
	documentation strings to classes and methods