Py3: fix import of Cython.Compiler.Version in setup.py

Cython/Shadow.py

@@ -150,9 +150,12 @@ class typedef(CythonType):
         
 
 
-py_int = int
-py_long = long
 py_float = float
+py_int = int
+try:
+    py_long = long
+except NameError: # Py3
+    py_long = int
 
 
 # Predefined types

Cython/__init__.py

 # Void cython.* directives (for case insensitive operating systems). 
-from Shadow import *
+from Cython.Shadow import *

setup.py

@@ -2,10 +2,7 @@ from distutils.core import setup, Extension
 from distutils.sysconfig import get_python_lib
 import os, os.path
 import sys
-try:
-    from Cython.Compiler.Version import version
-except ImportError:
-    version = None
+from Cython.Compiler.Version import version
 
 compiler_dir = os.path.join(get_python_lib(prefix=''), 'Cython/Compiler')
 if sys.platform == "win32":