- The commands are now dispatched in Command.pm. Only the method exec_command() is...

- In directory listing, the link "Do other stuff" was renamed to "Work with file".
- In directory listing, there is now a link called "Work with directory" which displays a form to rename and to remove a directory.
- Added the possibility to completely remove a directory (I built a confirmation dialog!).
- Added default permission to mkdir() (sometimes, this is necessary).