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* Deal with AccessDeniedException properly 3.
* Return some helpful information if boto raises NoAuthHandlerFound 2.
* Make --aws-access-key-id, --aws-secret-access-key and --aws-region available to all parsers (groups, streams, get).
* Make it required to provide a valid region using --aws-region or AWS_REGION.
* Improve error messages by providing some hints.
* Add MANIFEST file 7.