Document changelog from "roughly-0.8" to "Dec-2019"

Please document the changelog from the roughly-0.8 version to the Dec-2019 version. It may be useful to categorize the changes by if and how they require action from server- and/or client- implementers:

• changes that will make a roughly-0.8 server incompatible with a Dec-2019 client
• changes that will make a roughly-0.8 client incompatible with a Dec-2019 server
  1. #77 Restructure JWT in Authorization header Bearer token (the SolidAuthClient will look at the WWW-Authenticate header and be able to switch between both formats, but new servers will only be required to implement the new one). Note that this change will at first be documented in a PR and not in the master spec text, but @jaxoncreed will already add support for it to Solid-Auth-Client.
  2. Add AUTH command to WebSockets protocol (older servers will ignore the AUTH command but newer ones will require it)
  3. Remove SPARQL-on-GET
  4. Remove Globbing
• changes that will break compatibility in both directions
• changes that are non-breaking

@csarven @kjetilk is this list correct?

Compare the specification changes between the roughly-0.8 and Dec-2019 versions, starting with issue #77 and the listed JWT, WebSockets AUTH, SPARQL-on-GET, and Globbing changes. Done means a changelog categorizes changes as server-breaking, client-breaking, breaking in both directions, or non-breaking, with the compatibility implications documented.