Add Python 3 targets to tox.ini

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py26_dj14, py27_dj14, py26_dj15, py27_dj15, py26_dj16, py27_dj16
+envlist = py26_dj14, py27_dj14, py26_dj15, py27_dj15, py26_dj16, py27_dj16, py33_dj15, py33_dj16, py34_dj15, py34_dj16
 
 [testenv:py26_dj14]
 basepython = python2.6
@@ -30,6 +30,18 @@ commands = pip install django<1.5.99
            pip install -r requirements/dev.txt
            {envpython} run_tests.py
 
+[testenv:py33_dj15]
+basepython = python3.3
+commands = pip install django<1.5.99
+           pip install -r requirements/dev.txt
+           {envpython} run_tests.py
+
+[testenv:py34_dj15]
+basepython = python3.4
+commands = pip install django<1.5.99
+           pip install -r requirements/dev.txt
+           {envpython} run_tests.py
+
 [testenv:py26_dj16]
 basepython = python2.6
 commands = pip install django<1.6.99
@@ -41,3 +53,15 @@ basepython = python2.7
 commands = pip install django<1.6.99
            pip install -r requirements/dev.txt
            {envpython} run_tests.py
+
+[testenv:py33_dj16]
+basepython = python3.3
+commands = pip install django<1.6.99
+           pip install -r requirements/dev.txt
+           {envpython} run_tests.py
+
+[testenv:py34_dj16]
+basepython = python3.4
+commands = pip install django<1.6.99
+           pip install -r requirements/dev.txt
+           {envpython} run_tests.py