Don't require persistent at setup time. We don't build native code that needs...

Don't require persistent at setup time. We don't build native code that needs those headers anymore. Fixes #119.

(cherry picked from commit d7dae8b1)

CHANGES.rst

@@ -2,6 +2,12 @@
  Change History
 ================
 
+4.4.5 (unreleased)
+==================
+
+- ``persistent`` is no longer required at setup time.
+  See `issue 119 <https://github.com/zopefoundation/ZODB/issues/119>`_.
+
 4.4.4 (2016-11-27)
 ==================
 

setup.py

@@ -119,7 +119,6 @@ tests_require = ['zope.testing', 'manuel']
 
 setup(name="ZODB",
       version=version,
-      setup_requires=['persistent'],
       author="Jim Fulton",
       author_email="jim@zope.com",
       maintainer="Zope Foundation and Contributors",