storage: Improve Directory API
This fixes a few minor issues and extends the Directory
API:
-
__iter__
support to iterate over directory entries stat()
-
isfile()
,isdir()
andislink()
file_digest()
readlink()
remove()
rename()
These methods will be used by bst-plugins-experimental.
Part of #1262 (closed).
Edited by Jürg Billeter