Add google.auth.crypt (#6)

diff --git a/docs/reference/google.oauth2.rst b/docs/reference/google.oauth2.rst
new file mode 100644
index 0000000..fb67d27
--- /dev/null
+++ b/docs/reference/google.oauth2.rst
@@ -0,0 +1,8 @@
+google.oauth2 package
+=====================
+
+.. automodule:: google.oauth2
+    :members:
+    :undoc-members:
+    :show-inheritance:
+