[GRASS5] 5.4 release branch

[Hamish]

> Here is my first rough draft of what to put in the NEWS file for 5.4.0, 
> additions and corrections welcome:

> r.univar2 now operational (Hamish)

This isn't built by default, so I don't think it is worth mentioning.
[goes for d.nviz, r.series, etc too]


> v.in.garmin.sh now operational (Hamish)

(it did work before, just not as well..)


> d.zoom fixes (Hamish)

Might make that "d.zoom fixes for lat/lon" ?


The floating-point Lat/Lon dateline crossing bugfix should be mentioned.



Hamish