Update to note where code that is not mine came from
Update to note where code that is not mine came from

jonfoster/pyxb-upstream-mirror,CantemoInternal/pyxb,jonfoster/pyxb2,pabigot/pyxb,jonfoster/pyxb-upstream-mirror,CantemoInternal/pyxb,pabigot/pyxb,CantemoInternal/pyxb,jonfoster/pyxb2,jonfoster/pyxb2,jonfoster/pyxb-upstream-mirror,balanced/PyXB,balanced/PyXB,balanced/PyXB