Start testing with tox and travis-ci against Python 3.4.

.travis.yml

@@ -2,7 +2,8 @@ language: python
 sudo: false
 dist: trusty
 python:
-    - "2.7"
+    - 2.7
+    - 3.4
 install:
     - pip install -U setuptools==`grep setuptools versions.cfg | awk '{print $3}'`
     - pip install zc.buildout

tox.ini

@@ -1,18 +1,15 @@
 [tox]
 envlist =
-   py27,py27-pure
+   py27,py34
 
 [testenv]
 install_command = pip install --no-cache-dir --no-binary=:all: {opts} {packages}
 commands =
     zope-testrunner --test-path={envsitepackagesdir} -s Zope2
 deps =
     zope.testrunner
+    ./develop/AccessControl
+    ./develop/DocumentTemplate
+    ./develop/RestrictedPython
 setenv =
     PIP_NO_CACHE = 1
-
-[testenv:py27-pure]
-basepython =
-    python2.7
-setenv =
-    PURE_PYTHON = 1