- Add a ``request_type`` attribute to the available attributes of a
    ``bfg:view`` configure.zcml element.  This attribute will have a
    value which is a dotted Python path, pointing at an interface.  If
    the request object implements this interface when the view lookup
    is performed, the appropriate view will be called.

  - Remove "template only" views.  These were just confusing and were
    never documented.