Merge branch '0.25.x'

Cython/Distutils/build_ext.py

@@ -20,4 +20,4 @@ class new_build_ext(_build_ext, object):
         super(build_ext, self).finalize_options()
 
 # This will become new_build_ext in the future.
-from Cython.Distutils.old_build_ext as build_ext
+from .old_build_ext import old_build_ext as build_ext

Cython/Shadow.py

 # cython.* namespace for pure mode.
 from __future__ import absolute_import
 
-__version__ = "0.25.1b0"
+__version__ = "0.25.1b1"
 
 try:
     from __builtin__ import basestring