Updated trashbin app to work with FileList, BreadCrumb
Public page now uses ajax to load the file list

- Added Helper class in sharing app to make it easier to authenticate
  and retrieve the file's real path
- Added ajax/list.php to retrieve the file list
- Fixed FileActions and FileList to work with the ajax list
WIP cleanup of old attributes

Some old attributes can be inferred from the directory/share permissions.
Trashbin breadcrumb quickfix