Register our own handlers for error and notFound so that we can control the layout in non-debug mode.
404 if we can't find an event.
Use our new notFound page rather than the specific template.
Call through to notFound when we can't load the talk.
Fix registration link to point at our own site.
Call Slim's notFound() when we can't load an event from a cached talk stub's event_uri.
namespace for Slim
Merge branch 'akrabat-fix_slim_exception_pass'
Merge branch 'akrabat-homepage-registration-link'
Merge remote-tracking branch 'akrabat/error-handling'