[Gtkradiant] running radiant from svn checkouts

[SmallPileofGibs]

> So gtkradiant builds, and I run build/debug/radiant.ppc from the top of the
> source checkout, but dies immediately with a trace trap.  Running in gdb
> shows that an error dialog may have been shown, but alas the trap prevents
> one from seeing that dialog.
> 
> The error message is "Didn't find any valid game file descriptions,
> aborting", and after reading just about every document in the source, and
> everything I could find on the qeradiant website, I'm still stuck here.
> 
> I assume that the gamepacks also in the repository have something to do with
> this -- at least there's some fairly strong hints about it on the site.
> Where do these gamepacks need to be installed to for radiant to find them?
> 
> If i'm missing some crucial document, please point me to it :-)

That would be docs/developer/README =).
The linux 'running:' section says to copy some files from Q3Pack into
thhe /install dir - those files are the game-description for q3.

-SPoG