added a constant mappiung
added a constant mappiung

jameshensman/GPy,beckdaniel/GPy,ysekky/GPy,esiivola/GPYgradients,Dapid/GPy,befelix/GPy,SheffieldML/GPy,befelix/GPy,beckdaniel/GPy,SheffieldML/GPy,ysekky/GPy,AlexGrig/GPy,dhhjx880713/GPy,avehtari/GPy,Dapid/GPy,mikecroucher/GPy,AlexGrig/GPy,maaskola/GPy,buntyke/GPy,mikecroucher/GPy,PredictiveScienceLab/GPy,jameshensman/GPy,AlexGrig/GPy,buntyke/GPy,AlexGrig/GPy,SheffieldML/GPy,beckdaniel/GPy,avehtari/GPy,esiivola/GPYgradients,buntyke/GPy,ysekky/GPy,beckdaniel/GPy,avehtari/GPy,PredictiveScienceLab/GPy,befelix/GPy,maaskola/GPy,jameshensman/GPy,befelix/GPy,avehtari/GPy,esiivola/GPYgradients,mikecroucher/GPy,maaskola/GPy,SheffieldML/GPy,PredictiveScienceLab/GPy,esiivola/GPYgradients,ptonner/GPy,mikecroucher/GPy,ptonner/GPy,Dapid/GPy,dhhjx880713/GPy,ysekky/GPy,ptonner/GPy,jameshensman/GPy,dhhjx880713/GPy,Dapid/GPy,ptonner/GPy,PredictiveScienceLab/GPy,dhhjx880713/GPy,maaskola/GPy,buntyke/GPy