Allow anonymous S3 clients

[michaeldnelson]

It is a recommended security practice to use machine level IAM roles instead of putting credentials in your code. To do this you need to be able to create a client using credentials = false instead of providing a key and secret. It doesn't appear that is possible presently.

[jszobody]

Take a look at v3, you should now be able to create anon s3 clients.