more descriptive string functions on stockable and container. admin interface for Stock and Container now very slow to create these strings (each string requires a query). realize in doing this that i might want to scrap the current strategy to deal with polymorphic association (the generic stockables table) and replace with separate stock tables (worm_stock, antibody_stock) implementing the same interface, to take advantage of foreign key clarity/speed at the cost of redundant schemas in the database.