New tests for kernel
New tests for kernel

befelix/GPy,mikecroucher/GPy,dhhjx880713/GPy,SheffieldML/GPy,esiivola/GPYgradients,dhhjx880713/GPy,befelix/GPy,ysekky/GPy,befelix/GPy,dhhjx880713/GPy,mikecroucher/GPy,SheffieldML/GPy,esiivola/GPYgradients,SheffieldML/GPy,befelix/GPy,mikecroucher/GPy,ysekky/GPy,SheffieldML/GPy,dhhjx880713/GPy,ysekky/GPy,mikecroucher/GPy,esiivola/GPYgradients,esiivola/GPYgradients,ysekky/GPy