SGW-02: Transfer files to and from a community resource

Executive Summary: 
A science gateway developer needs to enable a gateway to transfer files to or from a community resource. A community resource is a resource provided to the community by a service provider (e.g., a compute cluster, a storage system).
User Importance Summary: 
Moving data to and from XSEDE SP resources is a basic function of most science gateways.
Target Communities and Sizes: 
Science gateway developers - 100 < N < 1,000 Application developers - 100 < N < 1,000 Science gateway users -100,000 < N < 1,000,000