[enh] Add balance

coin/members/admin.py

@@ -86,7 +86,7 @@ class OfferSubscriptionInline(admin.TabularInline):
 class MemberAdmin(UserAdmin):
     list_display = ('id', 'status', 'username', 'first_name', 'last_name',
                     'nickname', 'organization_name', 'email',
-                    'end_date_of_membership')
+                    'end_date_of_membership', 'balance')
     list_display_links = ('id', 'username', 'first_name', 'last_name')
     list_filter = ('status', MembershipFeeFilter)
     search_fields = ['username', 'first_name', 'last_name', 'email', 'nickname']