[Zope-CMF] Getting rid of index_html when skinning data classes

[Erik Dahl]

I have been migrating my zope app to use CMF skins.  I have it all 
working except the "default" view which currently uses the index_html 
attribute.  How should this work in a skinned world?  I have looked 
around for docs but haven't found any.  immediate_view in the 
factory_type_information looked like a good bet but doesn't do anything 
for me.

Also on a side note I only wanted to use CMFCore but looks like you need 
CMFDefault for the portal_url tool and then it depends on CMFTopic.  Are 
these dependencies necessary?  I'm new to CMF so maybe I'm missing 
something here.

-EAD