Travis: Removed python 2.5 from Travis tests, as this python

version has been discontinued from Travis tests. See:
http://about.travis-ci.org/blog/2013-11-18-upcoming-build-environment-updates/

.travis.yml

@@ -1,6 +1,5 @@
 language: python
 python:
-  - 2.5
   - 2.6
   - 2.7
   - 3.2
@@ -10,7 +9,7 @@ env:
   - DJANGO=1.4.0
   - DJANGO=1.4.5
   - DJANGO=1.5
-  - DJANGO=1.5.4
+  - DJANGO=1.5.5
 before_install:
   - export DJANGO_SETTINGS_MODULE=suit.tests.settings
 install:
@@ -21,10 +20,6 @@ script:
 matrix:
   exclude:
     # Django doesn't support following combinations
-    - python: 2.5
-      env: DJANGO=1.5
-    - python: 2.5
-      env: DJANGO=1.5.4
     - python: 3.2
       env: DJANGO=1.4.0
     - python: 3.2