Adds classes for selected menu states such as highlighting categories when viewing a blog post or parent page when viewing an attachment page.
Fix issue where menu selected states were not inherited correctly for non-404 pages.
Added Menu Selector support for 'ecms-404' and 'ecms-no-404' classes.
Added Menu Selector class. Add menus module and 'extraclasses_menu_item_class' filter for easier filtering of menu item classes. Restructure include files for modules.
First release (beta).