Fixes issue #85. Also moves all json imports to go through oauth2client.anyjson.  Reviewed in http://codereview.appspot.com/5531064/.
diff --git a/oauth2client/anyjson.py b/oauth2client/anyjson.py
new file mode 100644
index 0000000..ae21c33
--- /dev/null
+++ b/oauth2client/anyjson.py
@@ -0,0 +1,32 @@
+# Copyright (C) 2010 Google Inc.
+#
+# 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,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Utility module to import a JSON module
+
+Hides all the messy details of exactly where
+we get a simplejson module from.
+"""
+
+__author__ = 'jcgregorio@google.com (Joe Gregorio)'
+
+
+try: # pragma: no cover
+  # Should work for Python2.6 and higher.
+  import json as simplejson
+except ImportError: # pragma: no cover
+  try:
+    import simplejson
+  except ImportError:
+    # Try to import from django, should work on App Engine
+    from django.utils import simplejson