Media delete button working

Media can now be deleted, all image cached items for the relevant media
also get deleted.
Updated event renderer

Event renderer misdirected events to a  nonexistent controller. This
has been updated.

Events that are actually film references now direct to the appropriate
film page.
Added EAN search ability to list search

List search page can now search by EAN value and return an individual
product
Fixed product image rendering

Products were previously hardcoded to /public/products but now are
moved to a location specified by the config file.

Renderers for products in lists, list editor, and elsewhere are updated.