NTs for subtypes of gustatory epithelium and removed restriction that taste buds were always on (papillae of) tongue
    Merged primordial meninx with future meninx. Addresses #253

    Started aligning ventral thalamus with Butler and Hodos.
     Added part_of relations for ventral thalamic nuclei. After reasoning these will be inferred to be nuclei of thalamus, which Fixes #255

    NTs: facial disk, ear tuft (owls)

    Multiple modifications to support alignment with MP and MP equivalence axioms

      NT: tongue taste bud
      remove assumption that all taste buds are on tongue
       NTs for subtypes of gustatory epithelium and removed restriction that taste buds were always on (papillae of) tongue
      NT: pretectal nucleus
      still confusion about nucleus vs region
      tunica media no longer subclass of smooth muscle - instead has part
      transitional epithelium / urothelium notes
Modified definition of cricoid cartilage from Robert Druzinsky, modified from AAO definition. Also disambiguated tissue composition from primary classification.  Fixes #257
Removed part_of link between hyoid arch skeleton and facial skeleton. Mistake arising from viscerocranium confusion. Addresses #258