Turn group week view into general week view.

Closes #34 (closed)

biscuit/apps/alsijil/forms.py

@@ -2,7 +2,7 @@ from django import forms
 from django.db.models import Count
 from django.utils.translation import ugettext_lazy as _
 
-from biscuit.core.models import Group, Person
+from biscuit.core.models import Group, Person, Room
 
 from .models import LessonDocumentation, PersonalNote