add support for using IAM Credentials providers
remove extra console logging
Put the default content encoding as "gzip"
adjust the default access permissions
Add support for more options with respect to the deploy subtask
Allow ability to specify different upload groups with different options
Remove leftover console logging
remove extra console.log
Remove extra console.log statements
Merge pull request #1 from ifeelgoods/topic_use_aws_iam

Improve S3 service to support file metadata attachment during upload