Fixes #892 ... make .route() chainable.

backbone.js

@@ -731,6 +731,7 @@
         this.trigger.apply(this, ['route:' + name].concat(args));
         Backbone.history.trigger('route', this, name, args);
       }, this));
+      return this;
     },
 
     // Simple proxy to `Backbone.history` to save a fragment into the history.