Implement TarFS.geturl and ZipFS.geturl and Fix #329, #333, #340

fs/base.py

@@ -1652,7 +1652,7 @@ def hash(self, path, name):
             fs.errors.UnsupportedHash: If the requested hash is not supported.
 
         """
-        _path = self.validatepath(path)
+        self.validatepath(path)
         try:
             hash_object = hashlib.new(name)
         except ValueError: