Updated tested versions

.travis.yml

@@ -2,25 +2,15 @@ language: python
 
 python:
   - 2.7
-  - 3.3
-  - 3.4
+  - 3.5
 
 env:
-  - DJANGO=Django==1.4.15
-  - DJANGO=Django==1.5.10
-  - DJANGO=Django==1.6.7
-  - DJANGO=Django==1.7
-  - DJANGO=Django==1.8.5
+  - DJANGO="Django>=1.7,<1.8"
+  - DJANGO="Django>=1.8,<1.9"
+  - DJANGO="Django>=1.9,<1.10"
 
 install:
   - pip install -q $DJANGO
 
 script:
   - PYTHONPATH=$PYTHONPATH:$PWD django-admin.py test axes --settings=axes.test_settings
-
-matrix:
-    exclude:
-        - python: 3.3
-          env: DJANGO=Django==1.4.15
-        - python: 3.4
-          env: DJANGO=Django==1.4.15