Terminal moved to system & icon gone

Terminal is now no longer a plugin but part of the ICEcoder system. In
doing this, the icon was removed, plus the path to the settings.php file
altered

terminal/index.php

@@ -1,5 +1,5 @@
 <?php
-include("../../lib/settings.php");
+include("../lib/settings.php");
 if ($demoMode || !$_SESSION['loggedIn']) {
 	die("You must be logged in to access Terminal");
 }