Adds breadcrumbs to navigator module
modify default content to use {nav_breadcrumbs}
adds new cache classes (still needs gui for settings)
Modifies all caching stuff to use new cache classes.


git-svn-id: http://svn.cmsmadesimple.org/svn/cmsmadesimple@8746 3d254a34-79dc-0310-9e5f-be208747d8a0