Fix typo

Author: Kirill V. Lyadvinsky

setup.py

@@ -11,7 +11,7 @@
     version_info = re.match(r".*__version__ = '(.*?)'", f.read(), re.S).group(1)
 
 with open('README.rst') as f:
-    long_readme = f.read
+    long_readme = f.read()
 
 dev_requires = [
     'pytest>=2.8',