Form for creating a new listing.

Click on the "I'm a Borrower" link and it'll take you to a form where
you can upload an extremely simple listing.  This connects up with a
database in a more idiomatic CodeIgniter way, using a model.  We need to
figure out how to share DB configs.

The table is wefinance/user_listing, with primary keys listing_id
bigint(20) unsigned, and user_id bigint(20) unsigned, and story text and
state tinyint(4)