Update version number to 0.6b1 (0.6 beta 1) and add a comment about version naming.
Review URL: http://codereview.appspot.com/4551059
diff --git a/src/setup.py b/src/setup.py
index 98eeb00..57b0e13 100755
--- a/src/setup.py
+++ b/src/setup.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #
-# Copyright 2009, Google Inc.
+# Copyright 2011, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -56,7 +56,9 @@
       name=_PACKAGE_NAME,
       packages=[_PACKAGE_NAME, _PACKAGE_NAME + '.handshake'],
       url='http://code.google.com/p/pywebsocket/',
-      version='0.5.2',
+      # See the source of distutils.version, distutils.versionpredicate and
+      # distutils.dist to understand how to name version numbers.
+      version='0.6b1',
       )