Also updating version in setup.py

Author: krischer

setup.py

@@ -97,7 +97,7 @@ def get_package_data():
 
 setup_config = dict(
     name="pyasdf",
-    version="0.3.x",
+    version="0.4.0",
     description=DOCSTRING[0],
     long_description="\n".join(DOCSTRING),
     author="Lion Krischer",