A few minor changes like passing in a filename and fixing the different
spellings of the orientations.
In order to use it from kete though we have to mess with the PYTHONPATH. But
since it's a in-tree tool only anyway... meh.
This loses the ability to disable pressure on tablets. I think that's just a
leftover from before we knew how to handle pressure in SVG exports. We should
just fix that properly instead of having a config option here.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>