PluginIndexes as first product in any case. (Collector #2273)

- made parseIndexRequest much more smarter in parsing the request parameter

Note that requirement of Zope 2.2 or higher.  Explain how to put
cPickle in the right place in your Zope tree.

This ensures the interfaces are returned as a list and isolates knowledge of
the "__implements__" attribute.

-german "scharfes s" was not handled properly

In the change just before this one, I
corrected the optimization of not applying unused indexes (although this
optimization does not seem right since index.id is not necessarily
equivalent to the key to look for in the request).  DateTime objects
don't have and don't need a __len__ attribute.

empty dirs get lost during checkout with -P or in the win installer).

so that people know it exists) after updating to support Python 2.x.

a textual representation of the object
(Collector #2264)

dialog some Win2K users get at install time if they do not have admin
privileges on the machine.

(Collector #2248)

- minor code cleanup for handling wrong index names