Refactor tests to not use a Django project

.travis.yml

@@ -8,4 +8,4 @@ env:
 install:
   - "pip install -r requirements.txt"
   - "pip install Django==$DJANGO_VERSION"
-script: "python src/manage.py test testapp"
+script: "python src/auditlog_tests/runtests.py"

README.md

@@ -3,6 +3,8 @@
 django-auditlog
 ===============
 
+[![Build Status](https://travis-ci.org/jjkester/django-auditlog.svg?branch=master)](https://travis-ci.org/jjkester/django-auditlog)
+
 **Please remember that this app is still in development and not yet suitable for production environments.**
 
 ```django-auditlog``` (Auditlog) is a reusable app for Django that makes logging object changes a breeze. Auditlog tries to use as much as Python and Django’s built in functionality to keep the list of dependencies as short as possible. Also, Auditlog aims to be fast and simple to use.

src/auditlog_tests/runtests.py

@@ -0,0 +1,15 @@
+#!/usr/bin/env python
+import os
+import sys
+
+import django
+from django.conf import settings
+from django.test.utils import get_runner
+
+if __name__ == "__main__":
+    os.environ['DJANGO_SETTINGS_MODULE'] = 'auditlog_tests.test_settings'
+    django.setup()
+    TestRunner = get_runner(settings)
+    test_runner = TestRunner()
+    failures = test_runner.run_tests(["auditlog_tests"])
+    sys.exit(bool(failures))

src/auditlog_tests/test_settings.py

@@ -0,0 +1,24 @@
+"""
+Settings file for the Auditlog test suite.
+"""
+
+SECRET_KEY = 'test'
+
+INSTALLED_APPS = [
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'auditlog',
+    'auditlog_tests',
+]
+
+MIDDLEWARE_CLASSES = (
+    'django.middleware.common.CommonMiddleware',
+    'auditlog.middleware.AuditlogMiddleware',
+)
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.sqlite3',
+        'NAME': 'auditlog_test',
+    }
+}

src/testapp/tests.py → src/auditlog_tests/tests.py

@@ -6,7 +6,7 @@
 from django.test import TestCase, RequestFactory
 from auditlog.middleware import AuditlogMiddleware
 from auditlog.models import LogEntry
-from testapp.models import SimpleModel, AltPrimaryKeyModel, ProxyModel, \
+from auditlog_tests.models import SimpleModel, AltPrimaryKeyModel, ProxyModel, \
     SimpleIncludeModel, SimpleExcludeModel