Run django.setup() in runtests
Don't use get_user_model in models.py file
Fix broken import in Python 3
Note broken line in Django 1.7
Remove verbose_name and DB table fixes for 1.7
Fix admin site tests for Django 1.7
Update Django 1.6 version in tests
Upgrade Django versions in tox
Update Django version tests in Travis file
Remove deprecated test runner for Django 1.8
Fix some Django 1.8 deprecation bugs
Test against Django 1.7
Fix _meta.module_name removal in Django 1.8
Revert feature regressions for 1.7

@aaugustin 1.7 bugs should be apparent now
Django 1.7 app fixes suggested by @aaugustin
Support new get_queryset method for Django 1.8
Use smart_text on verbose_name (thanks @aaugustin)
Merge branch 'django-1.7'

Conflicts:
	simple_history/models.py
Conform to PEP8
Normalize crazy imports in tests file