WISH: kick out xpm.C, replace by pixbuf
DUMB: support tex fonts
+TODO: http://www.cl.cam.ac.uk/~mgk25/ucs/scw-proposal.html
+
+TODO: wcwidth optimisaiton for <= 0xff is bogus, go to 0x7f or measure
8.0 Thu Nov 2 18:35:19 CET 2006
- combining characters cleared the area instead of creating an overlay,
thus losing the ability to draw combining characters properly in most