New SeaHorse output

SeaHorse now outputs the Prismatic Coefficient of the hull. More coefficients and measures will be implemented soon, as time allows. It looks like P105 is currently sporting 0.60 Cp hulls, I intend to drive that closer to 0.62-0.63, will tweak the hulls in the next step to achieve a higher Cp. There are some great discussions over the multihull forums about Cp and wet transoms.