Fix #1775 - item attrs not initialised correctly
Testcase for #1775
Add missing ap-southeast-2 region to the S3WebsiteEndpointTranslate class.
Merge pull request #1776 from mbox/bug1775-item-attrs

Make attrs supplied in Item.init be registered in self._updates for DynamoDB. Fixes #1776, #1775.
Merge pull request #1777 from tobiaspal/develop

Add missing ap-southeast-2 region to the S3WebsiteEndpointTranslate class. Fixes #1777.