setup: now using setuptools instead of distutils to work with pip

setup.py

@@ -5,8 +5,9 @@ import re
 import subprocess
 
 from distutils import log
-from distutils.core import setup
-    
+#from distutils.core import setup
+from setuptools import setup    # to work with pip
+
 from distutils.core import Extension
 from distutils.sysconfig import get_python_lib