Implemented breadcrumbs.
Implemented folder size display as well.
Hook up with the correct Edit links for both files and folders.
Fix course root materials folder population script.
Make the Create Folder form work for editing; allow us to specify the method and whether we want it in a modal.
Added a template for editing a f.older
Fully skin the subfolder form to be both modal and non-modal
Allow specification of the description for a folder when creating.
Implemented renaming folders and editing their descriptions.