PickleError
     PicklingError
        UnpickleableError
     UnpicklingError

And change the handling of unpickleable objects so that an UnpickleableError
is raised with the unpickleable object as the argument.  UnpickleableError
has a reasonable string representation and provides access to the problem
object, which is useful during debugging.

a persistent object.  Importing Main breaks Zope 2 (which doesn't use Main).
Note that something needs to import Main or Zope before this gets called.

can use it and not import Main.

we can test for persistence from C.

browser caching to behave correctly :(

ZClasses.

handle 304 responses very well.

Fixed bug in something you don't want to know about. ;)

BACKWARD INCOMPATIBLE CHANGE in instance creation!

  - Previously, the __call__ method was an alias for the index_html method
    which took took an id and a request and created a new instance and
    added the instance to the destination.

  - Now, the __call__ method simply calls the underlying managed class
    with the supplied arguments to create and return an instance.  The
    instance is not added to a folder.

    The index_html method is now an alias for the
    createInObjectManager method, which does what the index_html method did
    before.

  - There is a new method, fromRequest, that takes an id and a request and
    creates a new instance.  It does not at the instance to a destination.

App.Management.Tabs.

new filtered_manage_options.

options that are accessable to a user.  Finally, made help a little
bit more like other methods.

Also added filtered_manage_options to find just those
options that are accessable to a user.  Finally, made help a little
bit more like other methods.

permission.

textareas.

(This may be a bit of a hack.  It appears that #in directives handle
newline whitespace differently than #if - #if seems to ignore it!  To
account for this i used a literal '\n' string, to be included after
every but the last value.)