Reconstructing Travis YML to only use selected combinations of django and python versions

.travis.yml

@@ -4,12 +4,24 @@ python:
   - "2.7"
   - "3.2"
   - "3.3"
-# command to run tests
+env:
+    - DJANGO="Django==1.4" SOUTH="South>=0.8.4"
+    - DJANGO="Django==1.5" SOUTH="South>=0.8.4"
+    - DJANGO="Django==1.6" SOUTH="South>=0.8.4"
+    - DJANGO="https://www.djangoproject.com/download/1.7.b4/tarball/" SOUTH=""
 install:
-  - pip install -r .travis/requirements_1.4.txt
-  - pip install -r .travis/requirements_1.5.txt
-  - pip install -r .travis/requirements_1.6.txt
-  - pip install -r .travis/requirements_1.7.txt
-script:
+  - pip install $DJANGO $SOUTH -r .travis/requirements.txt
+matrix:
+    exclude:
+        # Python 2.6 support has been dropped in Django 1.7
+        - python: "2.6"
+          env: DJANGO="https://www.djangoproject.com/download/1.7.b4/tarball/"
+        # Support for python 3 was added in Django 1.5
+        - python: "3.3"
+          env: DJANGO="Django==1.4"
+        - python: "3.2"
+          env: DJANGO="Django==1.4"
+# command to run tests
+- script:
   - cd testproject ; python -W error:"":"":0 manage.py test wiki --settings=testproject.settings.travis
 

.travis/requirements_1.4.txt

--r requirements.txt
-Django>=1.4,<1.5
-South

.travis/requirements_1.5.txt

--r requirements.txt
-Django>=1.5,<1.6
-South

.travis/requirements_1.6.txt

--r requirements.txt
-Django>=1.6,<1.7
-South

.travis/requirements_1.7.txt

--r requirements.txt
-#Django>=1.7,<1.8
-#Get the 1.7.b4
-https://www.djangoproject.com/download/1.7.b4/tarball/