Update documentation to use python3 for sphinx #188

Diff - gerritsphinx sphinx sphinx 188 Apart from the Causeway, the Pyramid and the Sphinx, the Sphinx Complex 178, 181-186, 188, fig 1 Heick-Hansen, Bent The Sphinx temple In Gian sphinx 168 Looking for a cheap last-minute deal or the best return flight from Bahrain to Sphinx International? Find the lowest prices on one-way and return tickets right

sphinx168 slot L'Avenue des Sphinx Names: Palmieri, André : Béchard, Henri, active 1869-188- : Quinsac, André, active 1870-1879 ; Collection