file (first in /usr/local/etc/tuxpaint, then /etc/tuxpaint, then $HOME)
for the window size settings and saved-file directory options
(rather than assuming a 640x480 screen and images saved in
$HOME/.tuxpaint/saved/).
Discovered (or assumed) window size and directory settings are shown
when tuxpaint-import is first run (even with no arguments).