Added a Reserved Names page to the userguide, and migrated reserved controller names into it.

Added a Common Functions page to the userguide for globally available functions.
diff --git a/user_guide/general/autoloader.html b/user_guide/general/autoloader.html
index b75a71d..3456fba 100644
--- a/user_guide/general/autoloader.html
+++ b/user_guide/general/autoloader.html
@@ -93,8 +93,7 @@
    ·  

 <a href="#top">Top of Page</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;

 <a href="../index.html">User Guide Home</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;

-Next Topic:&nbsp;&nbsp;<a href="scaffolding.html">Scaffolding</a>

-</p>

+Next Topic:&nbsp;&nbsp;<a href="common_functions.html">Common Functions</a></p>

 <p><a href="http://codeigniter.com">CodeIgniter</a> &nbsp;&middot;&nbsp; Copyright &#169; 2006-2008 &nbsp;&middot;&nbsp; <a href="http://ellislab.com/">Ellislab, Inc.</a></p>

 </div>