fixed syntax err
NT: vertebral endplate
NTs: muscles:  intrinsic muscle of manus, flexor digitorum brevis muscle, hypothenar muscle, adductor hallucis muscle
NTs: collection of hairs on head or neck, whorl of hair
NT: aryepiglottic fold

added fma_set_term tag to map to Set of X terms in FMA
removed all homologous_in for upper_level terms. Addresses #246
added weak taxon constraint