Addresses #134.
The catalog template has been modified to use the board array, which
is expected by the post form template. Because the overboard is a
"virtual board", we created a "fake" overboard array to supply
necessary information to the modified template.
Javascript was also added to hide form on first visit.
For some reason, threads in the catalog were laid out by a jQuery plug-in. This is
now removed and the layout is created purely by handcrafted CSS code.