Documentation generation

[David Cuthbert <dacut@xxxxxxxxx>]

[Followups to dragonfly.docs]

Just curious if anyone out there has started to create Doxygen (or 
similar) headers for the source.  If not, I'd like to have a go at this.

(I imagine that it'd make more sense to maintain a separate tree for 
such a thing right now -- I doubt that everyone would enjoy having to 
deal with merge conflicts.)