Added basic error handling logic for RDF::WriterError exceptions.
Added basic error handling logic for RDF::WriterError exceptions.

If an RDF::WriterError is caught when attempting to serve a negotiated serialization format, we now output a 406 Not Acceptable response. This could (and should) be further enhanced in the future to attempt serializing into the next most-preferred format, if any.

ruby-rdf/rack-linkeddata