Moved classes to models_caves and fixed imports

utils.py

@@ -4,7 +4,7 @@ import logging
 
 from django.conf import settings
 from django.shortcuts import render
-from troggle.core.models import CaveDescription
+from troggle.core.models_caves import CaveDescription
 
 def weighted_choice(lst):
     n = random.uniform(0,1)