cboettig/rdflib: A high level wrapper around the redland package for common rdf applications

A friendly and concise user interface for performing common tasks on rdf data, such as parsing and converting between formats including rdfxml, turtle, nquads, ntriples, and trig, creating rdf graphs, and performing SPARQL queries. This package wraps the redland R package which provides direct bindings to the redland C library. Additionally, the package supports parsing and serialization of rdf into 'JSON-LD' through the jsonld package, which binds the official JSON-LD javascript API. This package interface takes inspiration from the Python rdflib library.