Register all current models for django-admin. Closes #35.

bigbluebutton/django/admin.py

+"""Stub for registering models in django-admin for those who want it."""
+from django.contrib import admin
+
+from .models import APIToken, BigBlueButton, BigBlueButtonGroup, Meeting
+
+
+admin.site.register(APIToken)
+admin.site.register(BigBlueButton)
+admin.site.register(BigBlueButtonGroup)
+admin.site.register(Meeting)