Drop support for unsupported django versions

Since django 1.8 is an LTS release, we're dropping support for older
versions.

Since django 1.7 is still relatively recent, we'll be keeping support
for it for now.

.travis.yml

@@ -4,25 +4,14 @@ install:
 script:
   - tox
 env:  # generate list with: $ tox -l | xargs -I ITEM echo "  - TOXENV="ITEM
-  - TOXENV=py26-django14
-  - TOXENV=py26-django15
-  - TOXENV=py26-django16
-  - TOXENV=py27-django14
-  - TOXENV=py27-django15
-  - TOXENV=py27-django16
-  - TOXENV=py32-django15
-  - TOXENV=py32-django16
-  - TOXENV=py32-django17
-  - TOXENV=py32-django18
-  - TOXENV=py33-django15
-  - TOXENV=py33-django16
-  - TOXENV=py33-django17
-  - TOXENV=py33-django18
-  - TOXENV=py27-django17
-  - TOXENV=py27-django18
-  - TOXENV=py27-django19
-  - TOXENV=py34-django17
-  - TOXENV=py34-django18
-  - TOXENV=py34-django19
-  - TOXENV=py35-django18
-  - TOXENV=py35-django19
+    - TOXENV=py27-django17
+    - TOXENV=py27-django18
+    - TOXENV=py27-django19
+    - TOXENV=py32-django17
+    - TOXENV=py33-django17
+    - TOXENV=py33-django18
+    - TOXENV=py34-django17
+    - TOXENV=py34-django18
+    - TOXENV=py34-django19
+    - TOXENV=py35-django18
+    - TOXENV=py35-django19

requirements.txt

@@ -1 +1 @@
-Django
+Django>=1.7.0

setup.py

@@ -98,6 +98,6 @@ setup(
     download_url='https://github.com/jcassee/django-analytical/archive/master.zip',
     cmdclass=cmdclass,
     install_requires=[
-        'Django>=1.4',
+        'Django>=1.7.0',
     ],
 )

tox.ini

@@ -1,9 +1,8 @@
 [tox]
 envlist =
-    py{26,27}-django{14,15,16},
-    py{32,33}-django{15,16,17,18},
-    py{27,34}-django{17,18,19},
-    py{35}-django{18,19}
+    py{27,32,33,34}-django17
+    py33-django18
+    py{27,34,35}-django{18,19}
 
 [testenv]
 commands =
@@ -12,9 +11,6 @@ commands =
 deps =
     coverage==3.7.1
     coveralls
-    django14: Django>=1.4,<1.5
-    django15: Django>=1.5,<1.6
-    django16: Django>=1.6,<1.7
     django17: Django>=1.7,<1.8
     django18: Django>=1.8,<1.9
     django19: Django>=1.9,<1.10