Add google-endpoints to third_party/.

third_party/google-endpoints/future/moves/urllib/response.py

+from future import standard_library
+from future.utils import PY3
+
+if PY3:
+    from urllib.response import *
+else:
+    __future_module__ = True
+    with standard_library.suspend_hooks():
+        from urllib import (addbase,
+                            addclosehook,
+                            addinfo,
+                            addinfourl)
+