RES Service protocol package

[jirenius]

Issue

The res package should have a sub package, resprot, with low level structs and methods for making requests to RES Services connected to NATS server.

The resprot package would be used for making requests and parsing responses. The package should not include logic about event handling with real-time updates, as that will be covered by the broader scope of issue #66 .

[jirenius]

Resolved in #74 and 2447095