[Zope-CMF] Proposal to modify File

[seb bacon]

At the moment, my MSWord conversion stuff manifests itself in a
WordDoc Type.  However, it occured to me that it would probably be
nicer to sniff File types at upload time and create the correct type
accordingly, rather than having a whole slew of different types to
chose from for a new file when you create it.  This would require File
being implemented in a similar way to NullResource, I guess, creating
the correct object by looking it up in the brand new, very cool
content types registry.   

cheers,

seb