added URLParams library class which makes things like getting the correct year/type easier
Merge branch 'feature/fix-routes-pg' of https://github.com/unikent/programmes-plant into refactor/menus-and-links

Conflicts:
	application/views/admin/inc/header.php
	application/views/admin/inc/sidebar.php
 * change globalsettings data to have year. its the globalsetting fields that dont need a year