Fix Travis configuration file for Python 2.5

.travis.yml

@@ -1,7 +1,6 @@
 language: python
 
 python:
-  - "2.5"
   - "2.6"
   - "2.7"
 
@@ -15,16 +14,18 @@ env:
 
 install:
   - pip install $DJANGO --use-mirrors
-  - pip install coverage coveralls --use-mirrors
   - sh -c "if [ '$SOUTH' = '1' ]; then pip install South==0.7.6; fi"
+  - sh -c "if [ '$COVERALLS' != '0' ]; then pip install coverage coveralls; fi"
 
 script: coverage run -a --branch --include="simple_history/*" --omit="simple_history/tests/*" setup.py test
 
 matrix:
-  exclude:
+  include:
    - python: 2.5
-     env: DJANGO=Django==1.5.1 SOUTH=1
+     env: DJANGO=Django==1.2.7 SOUTH=1 COVERALLS=0
    - python: 2.5
-     env: DJANGO=https://github.com/django/django/tarball/master SOUTH=1
+     env: DJANGO=Django==1.3.7 SOUTH=1 COVERALLS=0
+   - python: 2.5
+     env: DJANGO=Django==1.4.5 SOUTH=1 COVERALLS=0
 
 after_success: coveralls