added all_vf.json. a json file created for webvowl by owl2vowl
Created by: bshambaugh
Processed all_vf.ttl with https://github.com/bshambaugh/OWL2VOWL/tree/master/target/owl2vowl.jar . Fed the resulting file, all_vf.json into https://github.com/VisualDataWeb/WebVOWL via Ontology>Custom Ontology > {"upload from file"} > Upload .