Fixed #12811 -- Modified Tutorial 2 to indicate that the templating language...

Fixed #12811 -- Modified Tutorial 2 to indicate that the templating language will be covered later. Thanks to bac for the suggestion, and Gabriel Hurley for the draft text.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12710 bcc190cf-cafb-0310-a4f2-bffc1f526a37