fix download (aggiunta di nuove librerie da Alfa)

lib/future/moves/urllib/error.py

@@ -0,0 +1,16 @@
+from __future__ import absolute_import
+from future.standard_library import suspend_hooks
+
+from future.utils import PY3
+
+if PY3:
+    from urllib.error import *
+else:
+    __future_module__ = True
+
+    # We use this method to get at the original Py2 urllib before any renaming magic
+    # ContentTooShortError = sys.py2_modules['urllib'].ContentTooShortError
+
+    with suspend_hooks():
+        from urllib import ContentTooShortError
+        from urllib2 import URLError, HTTPError