Created default SyncAll function (using $everything) and SyncAllByResourceName which can be used as a fallback.
cleaned up DB layer , dont use Model unless Gorm cannot figure out the table. Use pointers consistently.
When syncing resources, store errors in a map, so that all resources get synced before returing errors
When GetRequest fails, print the body (may have helpful messages)
Make sure we can set the headers used by the GetRequest method per Source (BlueButton doesnt work with application/json+fhir header)
Added BlueButton Client, WIP
Jason Kulatunga