[dwm] wide patch

I didn't care for the status bar in 1.0, so I'm not making a patch for
it. But, I do mostly like what's on the tip tonight, so attached is my
wide mode patch for it. I made the wide mode default symbol "=", but in
my personal config.h file I have the following: TILE "|=", WIDE "==",
and FLOAT "OO". For me the "OO" symbolizes bubbles floating on water.
The other two are obvious.

Nice work, as usual, Anselm!

-RPM