Update oauth2client to v2.0.1 and googleapiclient to v1.5.0.

client/third_party/oauth2client/_pycrypto_crypt.py

 # Copyright 2015 Google Inc. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #      http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 97 matching lines @@
             key: string, private key in PEM format.
             password: string, password for private key file. Unused for PEM
                       files.
 
         Returns:
             Signer instance.
 
         Raises:
             NotImplementedError if the key isn't in PEM format.
         """
-        parsed_pem_key = _parse_pem_key(key)
+        parsed_pem_key = _parse_pem_key(_to_bytes(key))
         if parsed_pem_key:
             pkey = RSA.importKey(parsed_pem_key)
         else:
             raise NotImplementedError(
-                'PKCS12 format is not supported by the PyCrypto library. '
-                'Try converting to a "PEM" '
-                '(openssl pkcs12 -in xxxxx.p12 -nodes -nocerts > '
-                'privatekey.pem) '
-                'or using PyOpenSSL if native code is an option.')
+                'No key in PEM format was detected. This implementation '
+                'can only use the PyCrypto library for keys in PEM '
+                'format.')
         return PyCryptoSigner(pkey)