fixed bug with the bias kernel.
fixed bug with the bias kernel.

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