Homepage: Updated the embedded "to-do for stable" content

web/plugins/pages/html/stable_to-do_list.html

@@ -1,2 +1,2 @@
 <p>This to-do list is continually being updated by the deng team members. It contains items that are currently being worked on. See the <a href="http://dengine.net/dew/index.php?title=Roadmap">Roadmap</a> for longer-term plans.</p>
-<iframe class="todo_iframe" style="height:200em;" src="https://docs.google.com/document/pub?id=1hOlSSZkUHFfkxdeejyja844m80H-gHtUd1eVUN2VdCk&amp;embedded=true"></iframe>
+<iframe class="todo_iframe" style="height:200em;" src="https://dl.dropboxusercontent.com/u/11948701/todo_stable.txt"></iframe>