Get rid of the Lispworks specific PROCESS-A-SLOT-OPTION stuff and handle
the slot options in a way that's compatible with AMOP.

Remove INITARGS argument for UPDATE-PERSISTENT-INSTANCE-FOR-REDEFINED-CLASS,
because it turns out to be unnecessary (see details in notes.txt)

Add explanation to test-index-1a.lisp about the use of
  (eval-when (:compile-toplevel :load-toplevel :execute) ...)

Replace *RUCKSACK* by RS in the test-*.lisp files.