scigraph readme sparc-data load graph work around old owlapi
scigraph readme sparc-data load graph work around old owlapi

the version of owlapi that is used in scigraph has an ancient and
extremely broken ttl parser, so to work around the issue we convert to
rdf/xml before loading the graph

tgbugs/pyontutils,tgbugs/pyontutils,tgbugs/pyontutils,tgbugs/pyontutils