[Zope-CMF] Image/File objects and DC Format attribute

[alan runyan]

the setFormat attribute on DC Metadata appears to be akward in the cases of
File and Image.
shouldnt both Image and File override the DC setFormat method? i.e.

def setFormat(self, format):
    """ sets both self and DC format """
    self.content_type=format
    DublinCore.setFormat(self, format)

~runyaga