Initial files for MakeCode project

assets/js/custom.js

@@ -0,0 +1,11 @@
+/**
+ * This will be loaded before starting the simulator.
+ * If you wish to add custom javascript, 
+ * ** make sure to add this line to pxt.json**
+ * 
+ *      "disableTargetTemplateFiles": true
+ * 
+ * otherwise MakeCode will override your changes.
+ * 
+ * To register a constrol simmessages, use addSimMessageHandler
+ */