Add support for Python 3.5.

.travis.yml

 language: python
 sudo: false
+matrix:
+  include:
+    - python: 3.5
+      env: TOXENV=py35
 env:
     - TOXENV=py27
     - TOXENV=pypy

CHANGES.rst

@@ -4,6 +4,8 @@ Changes
 4.2.0 (unreleased)
 ------------------
 
+- Add support for Python 3.5.
+
 - Drop support for Python 2.6.
 
 4.1.0 (2015-05-22)

setup.py

@@ -105,6 +105,7 @@ setup(name='zope.container',
           'Programming Language :: Python :: 3',
           'Programming Language :: Python :: 3.3',
           'Programming Language :: Python :: 3.4',
+          'Programming Language :: Python :: 3.5',
           'Programming Language :: Python :: Implementation :: CPython',
           'Programming Language :: Python :: Implementation :: PyPy',
           'Natural Language :: English',

tox.ini

 [tox]
-envlist = py27,pypy,py33,py34,py27-zodb,pypy-zodb,py27-pure-zodb,docs
+envlist = py27,pypy,py33,py34,py35,py27-zodb,pypy-zodb,py27-pure-zodb,docs
 
 [testenv]
 commands = python setup.py -q test -q