Moodle can now upgrade itself, just like the modules do

version.php

@@ -0,0 +1,27 @@
+<?PHP  //$Id$
+// This file keeps track of upgrades to Moodle.
+// 
+// Sometimes, changes between versions involve 
+// alterations to database structures and other 
+// major things that may break installations.  
+//
+// This file specifies the current version of 
+// Moodle installed, which can be compared against
+// a previous version (see the "config" table).
+//
+// To do this, visit the "admin" page.
+//
+// The upgrade function in this file will attempt
+// to perform all the necessary actions to upgrade
+// your older databases to the current version.
+// If there's something it cannot do itself, it 
+// will tell you what you need to do.
+
+$version = 2002072704;
+
+function upgrade_moodle($oldversion) {
+
+    return true;
+}
+
+?>