Hello world for various modes of compilation.

demo/hello.js

@@ -0,0 +1,10 @@
+/* This is a code which is going to be compiled together with the library */
+
+function init() {
+    var map = ol.map()
+        .render('map')
+        .layers([ol.layer.osm()])
+        .center([45, 5])
+        .zoom(10);
+}
+window['init'] = init;