=====
* bugfix:``aws s3``: Fix issue where S3 downloads would hang in certain cases and could not be interrupted (`issue 650 <https://github.com/aws/aws-cli/issues/650>`__, `issue 657 <https://github.com/aws/aws-cli/issues/657>`__)
* bugfix:``aws s3``: Support missing canned ACLs when using the ``--acl`` parameter (`issue 663 <https://github.com/aws/aws-cli/issues/663>`__)
* bugfix:``aws rds describe-engine-default-parameters``: Fix pagination issue when calling ``aws rds describe-engine-default-parameters`` (`issue 607 <https://github.com/aws/aws-cli/issues/607>`__)
* bugfix:``aws cloudtrail``: Merge existing SNS topic policy with the existing AWS CloudTrail policy instead of overwriting the default topic policy
* bugfix:``aws s3``: Fix issue where streams were not being rewound when encountering 307 redirects with multipart uploads (`issue 544 <https://github.com/aws/aws-cli/issues/544>`__)
* bugfix:``aws elb``: Fix issue with documentation errors in ``aws elb help`` (`issue 622 <https://github.com/aws/aws-cli/issues/622>`__)
* bugfix:JSON Parameters: Add a more clear error message when parsing invalid JSON parameters (`issue 639 <https://github.com/aws/aws-cli/pull/639>`__)
* bugfix:``aws s3api``: Properly handle null inputs (`issue 637 <https://github.com/aws/aws-cli/issues/637>`__)
* bugfix:Argument Parsing: Handle files containing JSON with leading and trailing spaces (`issue 640 <https://github.com/aws/aws-cli/pull/640>`__)