Adds a button to make the xkcd forums posting box monospace
This script adds a button to the posting page of the xkcd forums that when pressed will toggle whether the input box uses a monospaced font (by default it uses a proportional font). This is useful for things like making sure that [code][/code] bbcode tags will display right.
This may work on other phpbb3 forums, but its completely untested anywhere other than the xkcd forums.
