attempt to test againt differnt django versions

Author: chfw

.travis.yml

@@ -3,12 +3,17 @@ language: python
 notifications:
   email: false
 env:
-  global:
+  - DJANGO_VERSION=1.5.12
+  - DJANGO_VERSION=1.6.11
+  - DJANGO_VERSION=1.7.8
+  - DJANGO_VERSION=1.8.2
+  - DJANGO_VERSION=1.9
 python:
   - 2.7
   - 3.3
   - 3.4
 install:
+  - pip install Django==$DJANGO_VERSION
   - pip install -r requirements.txt
   - pip install -r test_requirements.txt
 script:

requirements.txt

@@ -2,4 +2,4 @@ pyexcel>=0.1.4
 pyexcel-webio>=0.0.2
 pyexcel-xls>=0.0.7
 pyexcel-xlsx>=0.0.6
-django==1.7.1
+django>=1.5.12