- Complete rewrite of doc_collect.py

- A TexInfo formatter would be nice, but I don't know TexInfo :-(

- Pick up things like __author__ and __version__ in the import
  version. Kind of cumbersome for the parser(?)

- Generating manuals for all modules in the sys.path list.

- What about packages?

- Generating all modules in sys.path takes a *long* time. How
  can we shorten it? Only generate manual pages if the .py file
  is newer? Problem: Need to do something about the index page
  then.