Added test admin interface

src/core/admin.py

@@ -1,3 +1,9 @@
 from django.contrib import admin
+from .models import ItemType, Stickers, ItemInstance, Badge, Gamer
+
 
 # Register your models here.
+@admin.register(ItemType)
+class ItemTypeAdmin(admin.ModelAdmin):
+    list_display = ('paint_index', 'name', 'type', 'rarity', 'min_float', 'max_float', 'tradable')
+    list_editable = ()