Prepare release v0.3

Author: Attila Jeges

setup.py

@@ -44,7 +44,7 @@
                         libraries=["sasl2"],
                         language="c++")
 setup(name='sasl',
-      version='0.3a1',
+      version='0.3',
       url="http://github.com/cloudera/python-sasl",
       maintainer="Todd Lipcon",
       maintainer_email="[email protected]",