Separate long_description creation.

setup.py

@@ -2,13 +2,15 @@ from setuptools import setup, find_packages
 version = '3.1-dev'
 name = "slapos.rebootstrap"
 
+long_description = open("README.txt").read() + '\n\n'
+long_description += open("CHANGES.txt").read()
+
 setup(
   name=name,
   version=version,
   description="A zc.buildout extension to solve chicken-and-egg problem of"\
       " using python which is built by itself",
-  long_description=open("README.txt").read() + "\n\n" +
-    open("CHANGES.txt").read(),
+  long_description=long_description,
   classifiers=[
       "Development Status :: 4 - Beta",
       "Framework :: Buildout :: Extension",