Merge pull request #2 from jaw111/master

Refining JSON-LD structure
Testing content negotiation
Create context.jsonld
Create vocabulary.jsonld
Changed to dev branch
Removed .jsonld files
Added DBPedia Lookup API
Merge pull request #4 from dvh/develop

Develop
Fixed JSON-LD structure

moved `rdfs:seeAlso` links for efficiency labels to have the correct subject
Fixes
Merge pull request #3 from jaw111/master

changed to referenced context
Merge pull request #5 from dvh/develop

Fixes
Merge pull request #1 from dvh/master

Pull latest changes