fix broken default loader

examples/tetris/index.html

@@ -73,11 +73,7 @@ <h1>NaCl Tetris</h1>
 
   <script type="text/javascript">
     (function() {
-     var game = new Aroma("game", 300, 400, {
-        loaded: function() {
-          game.execute("require 'main' aroma.load()");
-        }
-     });
+     var game = new Aroma("game", 300, 400);
     })();
   </script>
 </body>

nacl/js/aroma.coffee

@@ -195,9 +195,10 @@ class Aroma
     @events.loaded = @events.loaded || =>
       @execute """
         require "main"
-        aroma.load and aroma.load()
+        if aroma and aroma.load then
+          aroma.load()
+        end
       """
-
     listen @listener, "load", =>
       log "Loaded module"
       @module = @listener.querySelector "embed"

site/js_reference.moon

@@ -97,6 +97,15 @@ package {
 
         By default, `std_out` is set to write to `console.log` and `std_err` is
         set to write to `console.err`.
+
+        The default loaded event executes the following Lua code:
+
+            ```lua
+            require "main"
+            if aroma and aroma.load then
+              aroma.load()
+            end
+            ```
       ]]
 
       code: [[