Updating autotest. Adding additional django versions in travis.

.travis.yml

@@ -1,8 +1,10 @@
 language: python
 env:
-  - 'DJANGO="1.4.13" GDAL=1.10 DB=spatialite'
-  - 'DJANGO="1.5.8" GDAL=1.10 DB=spatialite'
-  #- DJANGO=1.6 GDAL=1.10 DB=spatialite
+  - 'DJANGO=">=1.4,<1.5" GDAL=1.10 DB=spatialite'  # Django 1.4
+  - 'DJANGO=">=1.5,<1.6" GDAL=1.10 DB=spatialite'  # Django 1.5
+  - 'DJANGO=">=1.6,<1.7" GDAL=1.10 DB=spatialite'  # Django 1.6
+  # django 1.7 is currently broken --> https://code.djangoproject.com/ticket/22442
+  - 'DJANGO=">=1.8,<1.9" GDAL=1.10 DB=spatialite'  # Django 1.8
 python:
   - "2.7"
 virtualenv:
@@ -26,10 +28,10 @@ before_install:
   - 'if [ "$DB" == "postgis" ]; then sudo -u postgres psql eoxserver_testing -c ''create extension postgis;''; fi'
 install:
   # test with various Django versions
-  - pip install Django==$DJANGO
+  - pip install "django${DJANGO}"
   - django-admin.py --version
   # patch Django 1.4 libgeos
-  - 'if [ $DJANGO == "1.4.13" ]; then find /home/travis/virtualenv/ -name libgeos.py  -exec patch {} jenkins/geos-dev.patch \; ; fi'
+  - 'if [ $DJANGO == ">=1.4,<1.5" ]; then find /home/travis/virtualenv/ -name libgeos.py  -exec patch {} jenkins/geos-dev.patch \; ; fi'
   # actually install EOxServer
   - pip install .
   - export XML_CATALOG_FILES="`pwd`/schemas/catalog.xml"