Add notification at info-bar, and fix bug in visiting register/login page when user is already logged in.

notifications/models.py

@@ -0,0 +1,18 @@
+from django.db import models
+from django.forms import ModelForm, Textarea
+
+class Notification(models.Model):
+    message = models.CharField(max_length=512)
+    primary = models.BooleanField(default=False)
+
+class NotificationForm(ModelForm):
+    """
+    Form for adding notification.
+    """
+    class Meta:
+        model = Notification
+        fields = ('message', 'primary')
+        widgets = {
+            'message': Textarea(),
+        }
+