Make imports work.

src/allmydata/interfaces.py

@@ -1,4 +1,6 @@
 
+from past.builtins import long
+
 from zope.interface import Interface, Attribute
 from twisted.plugin import (
     IPlugin,

src/allmydata/storage/crawler.py

@@ -1,6 +1,9 @@
 
 import os, time, struct
+try:
     import cPickle as pickle
+except ImportError:
+    import pickle
 from twisted.internet import reactor
 from twisted.application import service
 from allmydata.storage.common import si_b2a