Vocabulary server

The vocabulary server provides common terms so that distributed data sources can be integrated. There need only be a single vocabulary server for any number of instances of the other servers. It simply provides a permanent, static URL for common terms so that we can use json-ld to integrate data from multiple sources. Our vocabulary server buildes heavily on existing ontologies and vocabularies, including the Sequence Ontology for genomic sequence terms, Schema.org for generic data terms, and others.