Feature 74 rdf type vs schema additional type

[ashepherd]

Completes issue #74

Most of the ADR had already been adopted.

• updated example JSON-LD for use of schema:additionalType; moved to @type
• updated the ADR 74-schemaorg-additionalType-vs-RDF-typing to 'Adopted'

[mbjones]

Overall this looks good. The one thing I noticed is that we should probably update the text in the CONVENTIONS.md in the section Typing to External Vocabularies to reflect the change to using @type. Most of the text in that section can probably be replaced with a description of how to use external types. I would recommend it include an overview of what happens in the Google Structured Data Testing Tool and a good example or two.

[ashepherd]

Great! thanks @mbjones. I've updated CONVENTIONS.md

[ashepherd]

thanks @mbjones (mac keyboard issue has been a pain). i can't approve my own pull request if someone else here can do that, that'd be great.

[mbjones]

Adam, the use of @typeguidelines look good to me. I merged in recent changes from develop, and then fixed some typos and wording in the feature branch. So, I think it is ready to be merged.