* AJAX expansion now uses JSON rather than XML
* Tidied up unused globals in navigaitonlib after recent refactoring
* Cleaned up Database calls that were no longer required after security changes
This patch introduces two new blocks global_navigation_tree and settings_navigation_tree
both of which have been designed to make full use of the new navigation objects available through
the $PAGE object.
Bulk of this code is within lib/navigationlib.php