tarsnap gui: call for testers

[Arnt Gulbrandsen <arnt@gulbrandsen.priv.no>]

It would be neat if someone were to test that program now.

The program is intended for people who haven't used tarsnap before. I 
think. I'm a bit uncertain whether there should be much guidance to take 
people from zero to having made a backup. I suspect that tarsnap's current 
audience prefers a more sparse/curt/functional approach. So that's what's 
there now.

When you test the GUI, please pretend that you're you and that you're just 
about to make your first tarsnap backup. Send me comments on that basis.

To test, first install Qt (any recent version will do), then:

 git clone https://github.com/arnt/tarsnap-gui.git
 cd tarsnap-gui
 qmake
 make

If you want to wipe your state to test from scratch again, run rm -rf 
~/.config/Tarsnap.

There is one known bug. I think it's in tarsnap, and have sent Colin a 
suggested patch: If you want to back up a particular directory (say 
/home/arnt) but not the directory /home/arnt/build, then the program does 
roughly

 cd /home/arnt
 tarsnap -c ... --exclude build .

That excludes /home/arnt/build, but it also excludes 
/home/arnt/mumble/build, which is perhaps what I intended. I consider this 
problem serious, since it results in missed backups. (Backing up too much 
is giving Colin too much money, which is not a serious bug. Backing up too 
little is perhaps much, much worse.)

Arnt