Cross account support

[barnettj]

Would be great to have a bit more support for when the S3 resource is in a different account. As it stands, if we were to put the object to another account's S3 bucket, we need to grant the bucket owner access to it.

We could extend the ExtendedClientConfiguration class to provide configuration for canned acl like this barnettj@0ca7b16.

Or we could even just make the putObject function protected and will give the consumers flexibility to extend and override the putObject method and apply whatever configuration they want to the request barnettj@3b25975.