Encapsulate discretization in Event::discretize_timeslots

Encapsulates the code to select the timeslot discretization.

Addresses #15 (closed)

AKModel/views/ak.py

@@ -9,7 +9,7 @@ from django.views.generic import ListView, DetailView
 from AKModel.availability.models import Availability
 from AKModel.metaviews.admin import AdminViewMixin, FilterByEventSlugMixin, EventSlugMixin, IntermediateAdminView, \
     IntermediateAdminActionView
-from AKModel.models import AKRequirement, AKSlot, DefaultSlot, Event, AKOrgaMessage, AK, Room, AKOwner, merge_blocks
+from AKModel.models import AKRequirement, AKSlot, Event, AKOrgaMessage, AK, Room, AKOwner
 
 
 class AKRequirementOverview(AdminViewMixin, FilterByEventSlugMixin, ListView):