Change references from Bitbucket to Github.
Release note about moving to Github.
Use released version of Django 1.6
Update doc references to use stable version.
Fix Django 1.6 _has_changed() incompatibility

In Django 1.6, Django forms dropped the _has_changed() method
from their own widgets, and want to call it on fields instead.

Also includes a workaround for the Django 1.6 test runner not
finding django-selectable's tests (using the old test runner).
Merge pull request #110 from dpoirier/django_16_has_changed_method

Fix Django 1.6 _has_changed() incompatibility. Fixes #109
Update test suite modules to match with unittest2 discovery.
Adding git ignore file.
Refactor tests as mixin classes to handle new test discovery.
Test with the default test runner for all Django versions.
Add release note about test compatibility.
Add travis ci config and badge.
Miss named configuration file.
Added note about Travis CI.
Update imports to work with Django 1.6 and django-localflavor.
Get rid of ugly JS monkey patch hack in the admin for a simple solution which works on Django 1.5+
Dropping support for Django 1.3 and 1.4.
Getting rid of old url import fallbacks.
Update jQuery versions in Grunt tasks.
Update Django version for building the docs.