allowing the manager to see more than the very first 20 previous transactions.

forgotten even though they can be resurrected via undo.

ZClasses.

used an incorrect variable name.

contain too much data.

Fixed a broken return.

without the create flag. This was reported by intrepid win32
Zopistas.  Why did it work on Unix?

Changed to use has_key rather than get to work with older mapping objects.

Added important note in constructor.

Changed to use keys() rather than items to iterate over
the index.

  - Provides a relatively simple example for building full storages,

  - Is useful for giving demos because it is non-persistent.

Took out incomplete code for allowing a base base storage.  Base storages
are trickier than they first seem.