[dwm] Wide Layout Patch for dwm-1.2

Wide Layout Patch
Good for working on audio waveforms, viewing log files and other things
with a horizontal orientation.

The togglelayout() function is default mapped to MODKEY-o (for
orientation) on the keyboard. It is also bound to mouse Button3 when
clicked on the mode indicator in the status bar. The toggle only works
in tile mode and does not have any effect when in float mode. The
default status bar mode indicator is "=".

Now also includes a viewall() function to dump all tags onto your view
at once. This is default mapped to MODKEY_0 on the keyboard. It is also
bound to mouse Button2 when clicked on any tag in the status bar.

Standard:
+-------+-----+
| | |
| +-----+
| | |
| +-----+
| | |
| | |
+-------+-----+

Wide:
+-------------+
| |
| |
| |
+-------------+
+-------------+
+-------------+
+-------------+

Cheers! -RPM