Low-hanging fruit: compulsory namespaces

[Tim Bray <Tim.Bray@xxxxxxx>]

I suggest that we have good enough consensus to remove the paragraph in 
draft-format-00 in section 2. beginning "All elements and attributes in 
an Atom document MUST be namespace-qualified".  Because lots of 
attributes aren't, and when it was pointed out that this would forbid 
encapsulating RSS 2.0 and Docbook, nobody pushed back and said "it's OK 
to forbid that".  -Tim