[enh] release 0.4

CHANGELOG

 Changelog
 =========
-0.4 (unreleased)
+0.4 (2014-09-29)
 ----------------
 - new rendering type in the nodes_rendering_order dictionary: string. This

setup.py

@@ -12,7 +12,7 @@ except ImportError:
 setup(name='baron',
-      version='0.3.1',
+      version='0.4',
       description='Full Syntax Tree for python to make writing refactoring code a realist task',
       author='Laurent Peuch',
       long_description=read_md("README.md") + "\n\n" + open("CHANGELOG", "r").read(),