[GRASS-PSC] grass-addons access for Martin Pavlovsky (Summer of Code student)

[Hamish]

> Unfortunately we would need to add all GRASS developers
> again to group=grass_addons :( Or you just bother those indicated
> above to insert people in grass_addons to avoid too much overhead.

I don't mind that job, it is pretty quick and has a good result:effort ratio.
I can't offer any guarantee of responsiveness for the next couple of months though, probably the opposite.


Hamish
(first real snow of the year!)