Allow resetting password through email.

This also adopts the use of an Alert template for error and success messages.

models/UserFacingException.php

@@ -0,0 +1,12 @@
+<?php
+/*****************************************************************************
+ * UserFacingException.php
+ * Contains exception class UserFacingException.
+ *
+ * Kabuki CMS (C) 2013-2016, Aaron van Geffen
+ *****************************************************************************/
+
+class UserFacingException extends Exception
+{
+
+}