Cache/retrieve extracted CIPD packages in local isolate cache

client/isolated_format.py

Index: client/isolated_format.py
diff --git a/client/isolated_format.py b/client/isolated_format.py
index e71a4b5b19085b04d0afe83ffaaac388e8f9e835..323bc46c68f322dd310534bd7732a2fac11190d6 100644
--- a/client/isolated_format.py
+++ b/client/isolated_format.py
@@ -86,7 +86,7 @@ class IsolatedFile(object):
   """Represents a single parsed .isolated file."""
 
   def __init__(self, obj_hash, algo):
-    """|obj_hash| is really the sha-1 of the file."""
+    """|obj_hash| is really the hash of the file."""
     self.obj_hash = obj_hash
     self.algo = algo