Old modules referenced in installer script

[dogmatic69]

This is part of #59

Notice (1024): Element Not Found: Blog.Elements/modules/post_tag_cloud/module.ctp [APP/CakePHP/lib/Cake/View/View.php, line 421]

Notice (1024): Element Not Found: Blog.Elements/modules/popular_posts/module.ctp [APP/CakePHP/lib/Cake/View/View.php, line 421]

Notice (1024): Element Not Found: Blog.Elements/modules/latest_posts/module.ctp [APP/CakePHP/lib/Cake/View/View.php, line 421]

These need to be updated in the core install data so that they work out the box after installing.