[GRASS5] GRASS terminology revisited

[Markus Neteler]

Hi all,

since there is partly some confusion in GRASS terminology, 
I have added the file

 html/terminology.html

to the CVS. Also available here:
http://grass.itc.it/gdp/html_grass5/terminology.html

It contains a small number of terms (to be extended) which
shall be explained to the users - maybe also to us. I would
be glad to receive comments/corrections/improvements.

It also contains a suggestion for 5.1 terminology (agreed with
Radim and David for vectors).

Thanks,

 Markus