Use Django 1.7b4 instead of 1.7b3
Merge pull request #6 from bh/master

Use Django 1.7b4 instead of 1.7b3
Do not set db_index to True

Fixes #7
Merge pull request #8 from dekkers/dbindex

Do not set db_index to True
Merge branch 'master' of github.com:5monkeys/django-enumfield

* 'master' of github.com:5monkeys/django-enumfield:
  Do not set db_index to True
  Use Django 1.7b4 instead of 1.7b3