Update tests for python3.4, drop django1.4 support

Tests were failing for django 1.4 which ended its extended support
period yesterday, so I removed it from the tests. Tox now supports a
much nicer parametrized configuration, so I updated tox.ini to use it.

I tried adding Django 1.8 to the tests, but the tests were failing.
They should be fixed in a separate commit.

tests/manage.py

@@ -3,11 +3,14 @@
 import sys
 import warnings
 
-warnings.simplefilter('error')
 
 if __name__ == "__main__":
     os.environ.setdefault("DJANGO_SETTINGS_MODULE", "tests.settings")
 
     from django.core.management import execute_from_command_line
 
+    # Python 3.4 raises deprecation warnings on import for django 1.5-1.7.
+    # We can ignore those by not setting the filter until after import.
+    warnings.simplefilter('error')
+
     execute_from_command_line(sys.argv)

tox.ini

@@ -1,77 +1,16 @@
 [tox]
 envlist=
-    py26-dj14,
-    py27-dj14,
-    py27-dj15,
-    py27-dj16,
-    py27-dj17,
-    py33-dj15,
-    py33-dj16,
-    py33-dj17
+  {py27,py34}-{dj15,dj16,dj17}
 
 [testenv]
-commands=/usr/bin/env make test
-
-[testenv:py27-dj14]
-basepython=python2.7
-deps =
-  https://github.com/django/django/archive/stable/1.4.x.zip#egg=Django
-  # https://bitbucket.org/hpk42/tox/issue/13/tox-should-reuse-tests_require
-  mock
-  six
-
-[testenv:py27-dj15]
-basepython=python2.7
-deps =
-  https://github.com/django/django/archive/stable/1.5.x.zip#egg=Django
-  # https://bitbucket.org/hpk42/tox/issue/13/tox-should-reuse-tests_require
-  mock
-  six
-
-[testenv:py27-dj16]
-basepython=python2.7
-deps =
-  https://github.com/django/django/archive/stable/1.6.x.zip#egg=Django
-  # https://bitbucket.org/hpk42/tox/issue/13/tox-should-reuse-tests_require
-  mock
-  six
-
-[testenv:py27-dj17]
-basepython=python2.7
-deps =
-  https://github.com/django/django/archive/stable/1.7.x.zip#egg=Django
-  # https://bitbucket.org/hpk42/tox/issue/13/tox-should-reuse-tests_require
-  mock
-  six
-
-[testenv:py33-dj15]
-basepython=python3.3
-deps =
-  https://github.com/django/django/archive/stable/1.5.x.zip#egg=Django
-  # https://bitbucket.org/hpk42/tox/issue/13/tox-should-reuse-tests_require
-  mock
-  six
-
-[testenv:py33-dj16]
-basepython=python3.3
-deps =
-  https://github.com/django/django/archive/stable/1.6.x.zip#egg=Django
-  # https://bitbucket.org/hpk42/tox/issue/13/tox-should-reuse-tests_require
-  mock
-  six
-
-[testenv:py33-dj17]
-basepython=python3.3
-deps =
-  https://github.com/django/django/archive/stable/1.7.x.zip#egg=Django
-  # https://bitbucket.org/hpk42/tox/issue/13/tox-should-reuse-tests_require
-  mock
-  six
-
-[testenv:py26-dj14]
-basepython=python2.6
-deps =
-  Django==1.4.8
-  # https://bitbucket.org/hpk42/tox/issue/13/tox-should-reuse-tests_require
+commands=
+  /usr/bin/env make test
+basepython=
+  py27: python2.7
+  py34: python3.4
+deps =
+  dj15: Django>=1.5,<1.6
+  dj16: Django>=1.6,<1.7
+  dj17: Django>=1.7,<1.8
   mock
   six