Specify utf-8 for index.rst in setup.py

Fixes #298

Author: lafrech

setup.py

@@ -1,3 +1,4 @@
+import io
 import os
 from setuptools import setup
 
@@ -7,7 +8,7 @@
 
 # Load index.rst as long_description
 doc_path = os.path.join(os.path.dirname(__file__), "docs", "index.rst")
-long_description = open(doc_path).read()
+long_description = io.open(doc_path, encoding='utf-8').read()
 
 # Stops exit traceback on tests
 try: