[Doxygen-develop] PATCH: Add tags for tabular lists (ala \param, \retval, etc)

[mwoehlke <mwo...@ti...>]

The attached patch adds \li2 and \li3 tags to Doxygen (diff'd against 
1.4.7). \li2 is identical to \param except that it does not cause a 
section to be created, and so can be used with custom sections (\par) or 
in the detailed description. \li3 uses the first (typically unused) 
column to make three-column lists (\li2 does 2-column lists, obviously); 
it treats '-' as an empty cell.

Needed improvements:
- Support the new tags in other output formats (shouldn't be difficult, 
but I don't feel familiar enough with the code - or LaTeX for that 
matter - to want to mess with it).

Suggested improvements:
- Allow mixing \li2 and \li3 in the same table/list (and then remove 
treating '-' as empty).
- Add \li1?

I'm also open to suggestions on how to make the new code less ugly (for 
instance, not needing the second params list would be nice).

-- 
Matthew
Will your shell have salvation? Only if it's Bourne Again.