The default TTF font is faulty (sand looks bad)

Dfterm3 at the moment ships with cootue curses square TTF font (with the author having given me permission to bundle it). Apparently sand is not shown properly on Chrome:

http://www.bay12forums.com/smf/index.php?topic=129995.msg5277557#msg5277557

We can either change or try to fix the TTF font.
