Issue #1866858 by linclark, scor: Test RDFa by parsing RDFa (add the easyrdf library).

core/composer.json

core/composer.lock

core/vendor/composer/autoload_namespaces.php

core/vendor/njh/easyrdf/lib/EasyRdf.php

core/vendor/njh/easyrdf/lib/EasyRdf/Exception.php

core/vendor/njh/easyrdf/lib/EasyRdf/Format.php

core/vendor/njh/easyrdf/lib/EasyRdf/Graph.php

core/vendor/njh/easyrdf/lib/EasyRdf/GraphStore.php

core/vendor/njh/easyrdf/lib/EasyRdf/Http.php

core/vendor/njh/easyrdf/lib/EasyRdf/Http/Client.php

core/vendor/njh/easyrdf/lib/EasyRdf/Http/Response.php

core/vendor/njh/easyrdf/lib/EasyRdf/Literal.php

core/vendor/njh/easyrdf/lib/EasyRdf/Literal/Boolean.php

core/vendor/njh/easyrdf/lib/EasyRdf/Literal/Date.php

core/vendor/njh/easyrdf/lib/EasyRdf/Literal/DateTime.php

core/vendor/njh/easyrdf/lib/EasyRdf/Literal/Decimal.php

core/vendor/njh/easyrdf/lib/EasyRdf/Literal/HTML.php

core/vendor/njh/easyrdf/lib/EasyRdf/Literal/HexBinary.php

core/vendor/njh/easyrdf/lib/EasyRdf/Literal/Integer.php

core/vendor/njh/easyrdf/lib/EasyRdf/Literal/XML.php