Test against Django 1.8

tox.ini

 [tox]
 envlist =
-    py26-1.6.X, py27-1.6.X, pypy-1.6.X, py33-1.6.X, py34-1.6.X,
-    py27, pypy, py33, py34,
+    py27-1.7.X, pypy-1.7.X, py34-1.7.X,
+    py27, pypy, py34,
     docs
 
 [testenv]
@@ -12,38 +12,38 @@ setenv =
 commands =
     {envbindir}/django-admin.py test {posargs:tests}
 
-[testenv:py26-1.6.X]
+[testenv:py26-1.7.X]
 basepython = python2.7
 deps =
-    Django>=1.6.0, <1.7
+    Django>=1.7, <1.8
     mock
     jinja2
     futures
 
-[testenv:py27-1.6.X]
+[testenv:py27-1.7.X]
 basepython = python2.7
 deps =
-    Django>=1.6.0, <1.7
+    Django>=1.7, <1.8
     mock
     jinja2
     futures
 
-[testenv:py34-1.6.X]
-basepython = python3.4
+[testenv:py33-1.7.X]
+basepython = python3.3
 deps =
-    Django>=1.6.0, <1.7
+    Django>=1.7, <1.8
     jinja2
 
-[testenv:py33-1.6.X]
-basepython = python3.3
+[testenv:py34-1.7.X]
+basepython = python3.4
 deps =
-    Django>=1.6.0, <1.7
+    Django>=1.7, <1.8
     jinja2
 
-[testenv:pypy-1.6.X]
+[testenv:pypy-1.7.X]
 basepython = pypy
 deps =
-    Django>=1.6.0, <1.7
+    Django>=1.7, <1.8
     mock
     jinja2
     futures
@@ -51,7 +51,7 @@ deps =
 [testenv:py27]
 basepython = python2.7
 deps =
-    Django>=1.7, <1.8
+    Django>=1.8, <1.9
     mock
     jinja2
     futures
@@ -59,7 +59,7 @@ deps =
 [testenv:pypy]
 basepython = pypy
 deps =
-    Django>=1.7, <1.8
+    Django>=1.8, <1.9
     mock
     jinja2
     futures
@@ -68,13 +68,13 @@ deps =
 basepython = python3.3
 deps =
     jinja2
-    Django>=1.7, <1.8
+    Django>=1.8, <1.9
 
 [testenv:py34]
 basepython = python3.4
 deps =
     jinja2
-    Django>=1.7, <1.8
+    Django>=1.8, <1.9
 
 [testenv:docs]
 basepython = python2.7