Added estimate sigma
Added estimate sigma
mdesco/dipy,rfdougherty/dipy,villalonreina/dipy,FrancoisRheaultUS/dipy,beni55/dipy,oesteban/dipy,jyeatman/dipy,sinkpoint/dipy,matthieudumont/dipy,rfdougherty/dipy,beni55/dipy,oesteban/dipy,Messaoud-Boudjada/dipy,Messaoud-Boudjada/dipy,matthieudumont/dipy,nilgoyyou/dipy,FrancoisRheaultUS/dipy,JohnGriffiths/dipy,demianw/dipy,StongeEtienne/dipy,villalonreina/dipy,jyeatman/dipy,nilgoyyou/dipy,JohnGriffiths/dipy,demianw/dipy,StongeEtienne/dipy,mdesco/dipy,sinkpoint/dipy