run tests on 3.3 unless django version is 1.4.10
support django 1.7 and mostly support 1.8
Merge pull request #86 from brad/33tests

run tests on 3.3 unless django version is 1.4.10
Merge branch 'django_1.7and8' of https://github.com/brad/django-import-export into brad-django_1.7and8
Merge branch 'brad-django_1.7and8'
Add @brad to AUTHORS