Proposal: Implement GNAP as a supported protocol

[joshfischer1108]

Iridium intentionally only supports the most recent version of OAuth, 2.1. There is a more modern protocol currently under development by the IETF called GNAP. Our goal is to support current OAuth 2.1 clients and add a translation layer to transfer systems over to GNAP wth Iridium. A good first step is to understand the overall protocol flow of GNAP then we can break down the individual pieces of protocol into smaller chunks of concrete work.

There are some acronyms to reference in the below diagram.

• Authorization Server (AS): The server that grants delegated privileges in the form of an access token
• Resource Server (RS): The server that provides operations on protected resources/data.
• Resource Owner (RO): Entity that may grant or deny operations on restricted resources
• End User: Person that operates a client application. The end user may or may not be the same entity as the RO.
  

[joshfischer1108]

It should be noted that we left out the continue responses are not accounted for in this diagram. We will address these in detail later on.