Add App namespace objects

src/002-config/fc-js-init.js

+/*
+* SugarCube executes scripts via eval() inside a closure. Thus to make App global,
+* we declare it as a property of the window object. I don't know why 'App = {}'
+* does not work.
+*/
+window.App = { };
+// the same declaration for code parsers that don't line the line above
+var App = App || {};
+
+App.Entity = {};