I have a lot of "Uncaught ReferenceError:" and "jquery.waypoints.min.js:7 Uncaught TypeError: Cannot read property" kinds of errors in my phoenix/elixir app. This is because of the wrong order in which the js fileds are concatendated or loaded and namespaces which brunch inserts I think. But all the setting are default and there's nothing about that in the documenation. I have a lot of "Uncaught ReferenceError:" and