Allow for cloud-based attachment storage for Collector for ArcGIS

Idea created by jpeal on Mar 2, 2015
    Allow "attachment" access/uploads (images, documents, etc.) via cloud-based storage in lieu of database attachments via ArcSDE for Collector for ArcGIS.  Spatial database can continue to reside on a non-cloud-based (local) server, but "attachments" reside in the cloud.