Fix bugs in intra-site linking

* Refactor event handling in controllers to use a method to define
  the hash (and thereby allow inheritance)
* Refactor link handling so that links which should be handled by the
  router can be handled by the base class
* Change the router to throw out controllers for pages which aren't
  on-screen (and thereby avoid a lot of weirdness)

src/scripts/main.coffee

@@ -24,7 +24,7 @@ global.logger = new Logger
 switch window.location.hostname
     when 'localhost'
         global.env = 'development'
-        logger.level = Logger.DEBUG
+        logger.level = Logger.INFO
     when 'new.crafting-guide.com'
         global.env = 'staging'
         logger.level = Logger.VERBOSE