Smoke test the 3D version, as well as the 4D version.
Smoke test the 3D version, as well as the 4D version.

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