Add :directory-p to fakir-file struct
Add parent directories with :directory-p flag

When creating namespace set the :directory-p flag for the parent
directories.
Reflect directory-p flag in fakir--file-attribs
Add directory-files/directory-files-and-attributes
Use match string on . and .. aswell
Merge pull request #4 from leoc/add-fake-directory-files-functions

Add fake directory files functions