Adds ticket sorting using the jQuery plugin Tablesorter, which is dual
licensed under MIT or GPL licenses. This allows users to sort by any
column in the table that their heart desires. The only problem with this
at all is that I didn't include the widgets, so you can't really *tell*
that you can sort. Of course, most folks will figure that out and the
people that won't will hear it from their friends.

This fixes issue #5.