subadd app

Handles just addition of new substances to the database at this point; there will be more functionality added, as any sort of editing or anything else needs to go through the admin interface currently.

Views available:

• index - displays a paginated list of substances, hyperlinked to the detail view to view their particulars, and with a link for adding new substances to the database (add view)
• add - displays the form for adding a new substance to the database, and handles putting it in there
• detail - displays the particulars regarding a specific substance in the database