libadt-980621

[Michael van Acken <mvacken@t-online.de>]

I have updated the files at
http://home.t-online.de/home/mvacken/

The module `Storage' is finished.  The last change:

    The field `Object.mark' is no longer used.  During externalization,
    objects are mapped to reference ids through a hash table.  With this
    change the algorithm is thread safe, there is no need to unmark
    objects, and the algorithm is more robust because it no longer depends
    on a properly initialized `mark'.

With this we have a fully functional persistence mechanism.  Now we
need some more classes to use it with  ;-)

-- mva