Merge pull request rholder#15 from svisser/patch-1

Ensure file handles are closed using with statement

setup.py

@@ -29,12 +29,17 @@
     'Topic :: Utilities',
 ]
 
+with open('README.rst') as file_readme:
+    readme = file_readme.read()
+
+with open('HISTORY.rst') as file_history:
+    history = file_history.read()
+
 settings.update(
     name='retrying',
     version='1.2.3-dev',
     description='Retrying',
-    long_description=open('README.rst').read() + '\n\n' +
-                     open('HISTORY.rst').read(),
+    long_description=readme + '\n\n' + history,
     author='Ray Holder',
     license='Apache 2.0',
     url='https://github.com/rholder/retrying',