Merge branch 'cmungall-master'
accomodate C. Mungall's requested change xunion_of->union_of.
his other changes have no effect on this parser.
update for WS244.
removed weired characters.
routine update, WS245.
If accepted, fixes issue #2

Added 2 NTs: male tail and male tail tip,
required for GO
See https://sourceforge.net/p/geneontology/ontology-requests/11074/?page=1