Styleguide and minor CSS refactoring

Tweeks to the template files were mostly just renaming some classes or elements, or tweaking markup in minor ways to increase consistency throughout the site.
It may seem silly, but can we create a new event called something like "err:load:singleEntity"? We'd have to add the appropriate bindings into events.js. The rationale is that, down the road, its likely that erroring on loading search results will trigger a different behavior than erroring on loading an entity page.