NF: Add the water volume fraction f to the FreeWaterTensorFit class properties
NF: Add the water volume fraction f to the FreeWaterTensorFit class properties

FrancoisRheaultUS/dipy,villalonreina/dipy,villalonreina/dipy,nilgoyyou/dipy,FrancoisRheaultUS/dipy,matthieudumont/dipy,matthieudumont/dipy,nilgoyyou/dipy