Update Django and Python versions in testing matrix (#101)

* Travis: Stop testing on Python 3.2

Since it's no longer supported as of 2016-02-20:
https://docs.python.org/devguide/#status-of-python-branches

* Travis: Stop testing on django-rest-framework 3.2

Since there have been two major releases since, and both support all
tested Django versions. If someone is going to stick on an older d-r-f,
they can just remain on an older django-rest-framework-filters too.

* Travis: Test with django-rest-framework 3.4

I don't think it's necessary to test every single permutation of
versions, so this leaves Django 1.8 as the only platform where d-r-f
3.3 is tested. However it's unlikely people using cutting edge Django
versions wouldn't also update to d-r-f 3.4.

* Travis: Test with Django 1.10

.travis.yml

@@ -4,14 +4,14 @@ sudo: false
 
 python:
   - "2.7"
-  - "3.2"
   - "3.3"
   - "3.4"
   - "3.5"
 env:
-  - DJANGO="django>=1.9.0,<1.10.0" REST_FRAMEWORK="djangorestframework>=3.3,<3.4"
+  - DJANGO="django>=1.10.0,<1.11.0" REST_FRAMEWORK="djangorestframework>=3.4,<3.5"
+  - DJANGO="django>=1.9.0,<1.10.0" REST_FRAMEWORK="djangorestframework>=3.4,<3.5"
+  - DJANGO="django>=1.8.0,<1.9.0" REST_FRAMEWORK="djangorestframework>=3.4,<3.5"
   - DJANGO="django>=1.8.0,<1.9.0" REST_FRAMEWORK="djangorestframework>=3.3,<3.4"
-  - DJANGO="django>=1.8.0,<1.9.0" REST_FRAMEWORK="djangorestframework>=3.2,<3.3"
 install:
   - travis_retry pip install -q $DJANGO $REST_FRAMEWORK "coverage==3.7.1"
   - pip install .
@@ -21,8 +21,8 @@ script:
 
 matrix:
   exclude:
-    - python: "3.2"
-      env: DJANGO="django>=1.9.0,<1.10.0" REST_FRAMEWORK="djangorestframework>=3.3,<3.4"
     - python: "3.3"
-      env: DJANGO="django>=1.9.0,<1.10.0" REST_FRAMEWORK="djangorestframework>=3.3,<3.4"
+      env: DJANGO="django>=1.10.0,<1.11.0" REST_FRAMEWORK="djangorestframework>=3.4,<3.5"
+    - python: "3.3"
+      env: DJANGO="django>=1.9.0,<1.10.0" REST_FRAMEWORK="djangorestframework>=3.4,<3.5"
   fast_finish: true

README.rst

@@ -20,9 +20,9 @@ Installation
 Requirements
 ------------
 
-* Python 2.7+
-* Django 1.8+
-* Django REST framework 3.0+
+* Python 2.7 or 3.3+
+* Django 1.8, 1.9, 1.10
+* Django REST framework 3.3, 3.4
 
 Usage
 -----