Add __version__ to each library.
Fixes issue 119.
Reviewed in http://codereview.appspot.com/5846050/.
diff --git a/oauth2client/__init__.py b/oauth2client/__init__.py
index e69de29..22b9bc9 100644
--- a/oauth2client/__init__.py
+++ b/oauth2client/__init__.py
@@ -0,0 +1 @@
+__version__ = "1.0beta8"