toc2: added toc3 template for demo purposes
toc2: added toc3 template for demo purposes

ipython-contrib/IPython-notebook-extensions,juhasch/IPython-notebook-extensions,ipython-contrib/IPython-notebook-extensions,andyneff/IPython-notebook-extensions,ipython-contrib/IPython-notebook-extensions,juhasch/IPython-notebook-extensions,juhasch/IPython-notebook-extensions,ipython-contrib/IPython-notebook-extensions,benvarkey/IPython-notebook-extensions,benvarkey/IPython-notebook-extensions,benvarkey/IPython-notebook-extensions,andyneff/IPython-notebook-extensions,andyneff/IPython-notebook-extensions,jcb91/IPython-notebook-extensions,jcb91/IPython-notebook-extensions,andyneff/IPython-notebook-extensions,jcb91/IPython-notebook-extensions,benvarkey/IPython-notebook-extensions