Updated setup.py

Now works with newer versions of pip

Author: mclevey

setup.py

@@ -27,7 +27,12 @@
 from os import path
 from codecs import open
 from setuptools import setup, find_packages
-from pip.req import parse_requirements
+
+# handle newer versions of pip
+try: 
+    from pip._internal.req import parse_requirements
+except ImportError: 
+    from pip.req import parse_requirements
 
 
 here = path.abspath(path.dirname(__file__))