Adds Travis CI support.

I already know that builds with certain Django versions are still failing, but
let's get in Travis CI support now to have transparency of failed tests.

.travis.yml

@@ -0,0 +1,16 @@
+language: python
+python:
+  - "2.7"
+  - "3.3"
+  - "3.4"
+env:
+  - DJANGO="Django>=1.3,<1.4"
+  - DJANGO="Django>=1.4,<1.5"
+  - DJANGO="Django>=1.5,<1.6"
+  - DJANGO="Django>=1.6,<1.7"
+  - DJANGO="Django>=1.7,<1.8"
+  - DJANGO="Django>=1.8,<1.9"
+install:
+  - pip install -q $DJANGO
+script:
+  - python runtests.py

README.rst

@@ -2,6 +2,9 @@
 django-lockdown
 ===============
 
+.. image:: https://travis-ci.org/Dunedan/django-lockdown.svg?branch=master
+    :target: https://travis-ci.org/Dunedan/django-lockdown
+
 A simple Django reusable application for locking down an entire site
 (or particular views), with customizable date ranges and preview authorization.