Restructure Alliance Auth package (#867)

* Refactor allianceauth into its own package

* Add setup

* Add missing default_app_config declarations

* Fix timerboard namespacing

* Remove obsolete future imports

* Remove py2 mock support

* Remove six

* Add experimental 3.7 support and multiple Dj versions

* Remove python_2_unicode_compatible

* Add navhelper as local package

* Update requirements

allianceauth/notifications/models.py

@@ -0,0 +1,36 @@
+from django.db import models
+from django.contrib.auth.models import User
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class Notification(models.Model):
+    LEVEL_CHOICES = (
+        ('danger', 'CRITICAL'),
+        ('danger', 'ERROR'),
+        ('warning', 'WARN'),
+        ('info', 'INFO'),
+        ('success', 'DEBUG'),
+    )
+
+    user = models.ForeignKey(User, on_delete=models.CASCADE)
+    level = models.CharField(choices=LEVEL_CHOICES, max_length=10)
+    title = models.CharField(max_length=254)
+    message = models.TextField()
+    timestamp = models.DateTimeField(auto_now_add=True)
+    viewed = models.BooleanField(default=False)
+
+    def view(self):
+        logger.info("Marking notification as viewed: %s" % self)
+        self.viewed = True
+        self.save()
+
+    def __str__(self):
+        return "%s: %s" % (self.user, self.title)
+
+    def set_level(self, level):
+        self.level = [item[0] for item in self.LEVEL_CHOICES if item[1] == level][0]
+
+    class Meta:
+        ordering = ['-timestamp']