Return parameters sent during MULTIGET

[conrs]

It would be nice to have a query field in the top-level response for a MULTIGET. This could contain all the query parameters and is mostly useful for troubleshooting and later reference.

E.g.

GET /?name=meow&limit=6&offset=200

{ 
   results: [...]
   query: {
       name: "meow",
       limit: 6,
       offset: 200
   }
}