fixed setup script to install ply subpackage as well
diff --git a/setup.py b/setup.py
index c02769e..673c41b 100644
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,7 @@
     classifiers = [

         'Programming Language :: Python :: 2',

         'Programming Language :: Python :: 3',],    

-    packages=['pycparser'],

+    packages=['pycparser', 'pycparser.ply'],

     package_data={'pycparser': ['*.cfg']},

 )