Some work on making use of PMR2/Ricordo rather than semanticSBML to retrieve possible ontological terms (#333).

This is all done, we are just waiting the PMR2/Ricordo feature to be
deployed, hence we are currently using
http://staging.physiomeproject.org/pmr2_ricordo/miriam_terms/ rather
than https://models.physiomeproject.org/pmr2_ricordo/owlterms/ at the
moment.