Serialize iodata and raw bytes in MarcoPolo.Protocol
Serialize iodata and raw bytes in MarcoPolo.Protocol

All lists are assumed to be iodata and are simply converted to
binaries (`IO.iodata_to_binary/1`) before being serialized. Raw bytes
are just returned unchanged (they're useful for things like the document
type, where you can do things like `{:raw, ?d}`).

linearregression/marco_polo,MyMedsAndMe/marco_polo