TODO: document -blr units, and possibly fix blur (20 seems to be about 3 pixels,
80 seems to be about 3 pixels, too, just much slower).
TODO: when window partilaly off-screen, -blr does not have any effetc anymore.
+TODO: rid of global dpy variable.
8.
- fix a lot of commandline switches (-C, -iconic, -ic, , -tr)
that were being ignored (Sasha Vasko).