split gamecard into its own app, add models to teamsnap for custom fields (images)

teamsnap/admin.py

@@ -1,6 +1,8 @@
 from django.contrib import admin
 
-from .models import Preferences
+from .models import Opponent, Preferences, Team
 
 # Register your models here.
 admin.site.register(Preferences)
+admin.site.register(Team)
+admin.site.register(Opponent)