Add support for Python 3.3.

CHANGES.txt

@@ -5,8 +5,8 @@
 4.0.2 (unreleased)
 ------------------
 
-- Added explicit support for Python 3.2 and PyPy.  Note that the
-  C extensions are not (yet) available on these platforms.
+- Added explicit support for Python 3.2, Python 3.3, and PyPy.
+  Note that the C extensions are not (yet) available on these platforms.
 
 - Python reference implementations now tested separately from the C
   verions on all platforms.

setup.py

@@ -125,6 +125,7 @@ setup(name='BTrees',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.2',
+        'Programming Language :: Python :: 3.3',
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Topic :: Database",

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,pypy,py32,w_zodb,coverage,docs
+    py26,py27,pypy,py32,py33,w_zodb,coverage,docs
 
 [testenv]
 deps =