memoize expensive attributes

lib/fog/aws/models/s3/bucket.rb

@@ -12,18 +12,22 @@ module Fog
         end
 
         def location
+          @location ||= begin
             data = s3.get_bucket_location(name)
-          @location = data.body['LocationConstraint']
+            data.body['LocationConstraint']
+          end
         end
 
         def payer
+          @payer ||= begin
             data = connection.get_request_payment(name)
             data.body['Payer']
           end
+        end
 
         def payer=(new_payer)
           connection.put_request_payment(name, new_payer)
-          new_payer
+          @payer = new_payer
         end
 
         def save