Add support for PyPy3.

CHANGES.rst

@@ -4,12 +4,14 @@
 4.0.9 (unreleased)
 ------------------
 
+- Add support for PyPy3.
+
 - 100% branch coverage.
 
 4.0.8 (2014-03-20)
 ------------------
 
-- Added support for Python 3.4.
+- Add support for Python 3.4.
 
 - In pure-Python ``Persistent``, avoid loading state in ``_p_activate``
   for non-ghost objects (which could corrupt their state).  (PR #9)

tox.ini

@@ -3,7 +3,7 @@ envlist =
 # Jython support pending 2.7 support, due 2012-07-15 or so.  See:
 # http://fwierzbicki.blogspot.com/2012/03/adconion-to-fund-jython-27.html
 #   py26,py27,py32,jython,pypy,coverage,docs
-    py26,py27,py27-pure,pypy,py32,py33,py34,coverage,docs
+    py26,py27,py27-pure,pypy,py32,py33,py34,pypy3,coverage,docs
 
 [testenv]
 deps =