Test against Django 1.4.6 & 1.5.2 (updated from 1.4.5 & 1.5.1)
Updating .travis.yml to run minor point versions of django releases without explicitly specifying them.
Updating .travis.yml to run minor point versions of django releases without explicitly specifying them.
Fix for install line.
Merge pull request #19 from djm/patch-1

Test against Django 1.4.6 & 1.5.2 (updated from 1.4.5 & 1.5.1)