Added S3 helper
Added S3 helper

vhtien/gooddata-ruby,vhtien/gooddata-ruby,lubosvesely/gooddata-ruby,lubosvesely/gooddata-ruby,vhtien/gooddata-ruby,Seikitsu/gooddata-ruby,Seikitsu/gooddata-ruby,lubosvesely/gooddata-ruby,Seikitsu/gooddata-ruby