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.