BF: return numpy arrays instead of memory views to allow saving with pickle.
BF: return numpy arrays instead of memory views to allow saving with pickle.

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