Implementation of _find api usage

[woutersm]

Hi Rhinoman,

I've implemented the find api, let me know what you think!

[rhinoman]

Hmm... it's fairly rudimentary, requiring the user to pass in a raw byte array for the request body. I'm not very familiar with the new Find API, but I think a more complete implementation of _find might define a struct representing a Find query and the user would pass an instance of a Find struct into the function, rather than (I assume), building their own structure and encoding it to a byte array before passing it in. I think it would be more user-friendly if the function handled such encoding.