NF - added pmf_treshold parameter for probabilistic tractography
NF - added pmf_treshold parameter for probabilistic tractography

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