Ensure documentation is included; remove W3C from doc subdir
Ensure documentation is included; remove W3C from doc subdir

pabigot/pyxb,jonfoster/pyxb2,jonfoster/pyxb2,balanced/PyXB,jonfoster/pyxb2,jonfoster/pyxb1,jonfoster/pyxb-upstream-mirror,jonfoster/pyxb-upstream-mirror,balanced/PyXB,CantemoInternal/pyxb,jonfoster/pyxb-upstream-mirror,CantemoInternal/pyxb,jonfoster/pyxb1,CantemoInternal/pyxb,balanced/PyXB,pabigot/pyxb