test against 3.4

tox.ini

 [tox]
 envlist =
     py26-1.5.X, py27-1.5.X, pypy-1.5.X,
-    py26, py27, pypy, py33, docs
+    py26, py27, pypy, py33, py34, docs
 
 [testenv]
 downloadcache = {toxworkdir}/_download/
@@ -71,6 +71,12 @@ deps =
     jinja2
     Django==1.6
 
+[testenv:py34]
+basepython = python3.4
+deps =
+    jinja2
+    Django==1.6
+
 [testenv:docs]
 basepython = python2.7
 changedir = docs