SYNC - need marshallers and data binders (parsers) for all the resources

[ppazos]

Create a SyncMarshallersService with the methods needed for marshalling.

Complex marshallers can't be implemented with registerObjectMarshaller.

• account (contains organizations, user, role, api keys, etc.)
• ehr
• contribution (contains versions)
• query
• ehr query
• opt index
• folder

[ppazos]

Added marshallers on this issue, binders will be done on another issue.