chg: pkg: CHENGELOG update
chg: pkg: CHENGELOG update

ysekky/GPy,SheffieldML/GPy,befelix/GPy,befelix/GPy,ysekky/GPy,esiivola/GPYgradients,SheffieldML/GPy,esiivola/GPYgradients,befelix/GPy,SheffieldML/GPy,befelix/GPy,SheffieldML/GPy,esiivola/GPYgradients,ysekky/GPy,ysekky/GPy,esiivola/GPYgradients