Added long missing Migration documentation.
diff --git a/user_guide/toc.html b/user_guide/toc.html
index bd6aaf5..01b5a7b 100644
--- a/user_guide/toc.html
+++ b/user_guide/toc.html
@@ -29,7 +29,7 @@
<div id="masthead">
<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
<tr>
-<td><h1>CodeIgniter User Guide Version 2.0.3</h1></td>
+<td><h1>CodeIgniter User Guide Version 2.1.0</h1></td>
</tr>
</table>
</div>
@@ -157,6 +157,7 @@
<li><a href="./libraries/javascript.html">Javascript Class</a></li>
<li><a href="./libraries/loader.html">Loader Class</a></li>
<li><a href="./libraries/language.html">Language Class</a></li>
+<li><a href="./libraries/migration.html">Migration Class</a></li>
<li><a href="./libraries/output.html">Output Class</a></li>
<li><a href="./libraries/pagination.html">Pagination Class</a></li>
<li><a href="./libraries/security.html">Security Class</a></li>