[GRASSLIST:186] Built-in vector documentation extended

[Markus Neteler]

Hi,

I have extended the vector overview document in
6.1-CVS, find also here:

 http://grass.itc.it/grass61/manuals/html61_user/vectorintro.html

While it covers most modules, each now in a thematic
context, it may be fine tuned, improved.
Text pieces welcome (preferably CVS patches).

The idea is to give a short overview.

Currently the page is even W3 conformant :-)

Cheers

 Markus