General Download

This pull request is for the Download from S3 tool.

It creates a module called S3 that accepts the S3 bucket as a parameter.

Then, there is a method called download_last_file(filename) that saves the download file with a given filename.
Place the . on the previous line, together with the method call receiver.<br>Prefer double-quoted strings unless you need single quotes to avoid extra backslashes for escaping.