Added ability to have section-level hints on Form library.
Added MY_Form_validation library
Added sub-navigation to template (next to breadcrumbs).

Tweaked CSS for forms.
Added default breadcrumb to Configure_Controller class
Comments on Layout library
Updated main configuration controller to add breadcumbs and remove unneeded navigation code.
Changed syntaxt of add_input() function in Form library.
Updated configuration/settings view file to use updated form library add_input syntax.
Re-positioned the section-level hint underneath the section heading (more consistent and will allow per-input hints on right)
Updated Authentication configuration for Global and LDAP to use Form library.