* glands/secretions:
  * NTs: anal gland secretion, cerumen gland
 * wikipedia mammals category alignment
  * NTs: hypogastrium, epipublic bone, udder, zygomatic plate,  entepicondylar foramen, ossicone, eimer organ, nasal tentacle, Grueneberg ganglion
 * Nervous system
  * added logical defs for grey and white matter terms; fixed text defss
tentative syns for surangular based on palaeos. See #164
 * Added experimental  confers_advantage_in links to ENVO
 * NT: otic notch
 * new glands from WP import
  * NT: violet, alveolar, Ciacco/wolfring, Moll, Henle, eyelid glana, supraorbitald
  * NT serous acinus
 * NT: ventrum, ventral trunka
 * NT: caudofemoralis
 * genital development
  * NTs: future glands (generic, male, female)
 * sourced additional text defs from WP; demoted some defs to external_definitions
 * NT: foramen of panizzi
partially fixed caudal vein / tail vein syn clash.
removed ZFIN xrefs