Rewrite travis config to use travis env/version matrix instead of tox

.travis.yml

@@ -4,7 +4,11 @@ language: python
 sudo: false
 
 python:
+  # - "2.6"    # do we really need to test/support 2.6?
   - "2.7"
+  - "3.3"
+  - "3.4"
+  # - "3.5"    # 3.5 not available by default on travis-ci
 
 addons:
   apt:
@@ -15,6 +19,20 @@ addons:
 # (install script doesn't yet support more than one)
 env:
   - FCREPO_VERSION=fedora-3.8.1
+  # - DJANGO_VERSION=">=1.5,<1.6"
+  - DJANGO=""   # no django
+  - DJANGO"Django>=1.6,<1.7"
+  - DJANGO="Django>=1.7,<1.8"
+  - DJANGO="Django>=1.8,<1.9"
+  - DJANGO="Django>=1.9,<1.10"
+
+# if we enable py2.6, restrict which django versions are tested
+# matrix:
+#   exclude:
+#   - python: 2.6
+#     env: DJANGO="Django>=1.7,<1.8"
+#     env: DJANGO="Django>=1.8,<1.9"
+#     env: DJANGO="Django>=1.9,<1.10"
 
 before_install:
   - export FCREPO_FOLDER=${HOME}/jfs/${FCREPO_VERSION}
@@ -26,15 +44,16 @@ install:
   - pip install --upgrade setuptools
   - pip install -e .
   - pip install -e ".[test]"
+  - pip install -q $DJANGO
   - pip install coveralls
   - cp ci/testsettings.py test/localsettings.py
 
 before_script:
   - ci/start-fedora.sh
 
 script:
-  tox
-  # nosetests test --with-coverage --cover-package=eulfedora --cover-xml --with-xunit
+  nosetests test --with-coverage --cover-package=eulfedora --cover-xml --with-xunit
+  # tox
 
 after_success:
   - coveralls