demo.html should write .st files as well

demo.html

@@ -10,7 +10,8 @@
     var AppEntity;
     require.config({
         paths: {
-            'gh_herby_trapped': 'lib/js'
+            'gh_herby_trapped': 'lib/js',
+            'gh_herby_trapped/_source': 'lib/st'
         }
     });
     require(