John fix issue#274 (#275)

* <fixed privacy policy errors>

* <Fixed code style>

* <Robustness changes>

* <redirect to 404 page if terms are disabled>

* <patched validation of accepted terms>

* <relaunching scrutinizer>

app/controllers/rooms_controller.rb

@@ -180,6 +180,8 @@ class RoomsController < ApplicationController
   end
 
   def validate_accepted_terms
-    redirect_to terms_path unless current_user.accepted_terms
+    if current_user
+      redirect_to terms_path unless current_user.accepted_terms
+    end
   end
 end