NF - added helper function _compact_tensor
NF - added helper function _compact_tensor

matthieudumont/dipy,sinkpoint/dipy,rfdougherty/dipy,oesteban/dipy,beni55/dipy,mdesco/dipy,demianw/dipy,StongeEtienne/dipy,samuelstjean/dipy,mdesco/dipy,maurozucchelli/dipy,jyeatman/dipy,oesteban/dipy,maurozucchelli/dipy,JohnGriffiths/dipy,nilgoyyou/dipy,Messaoud-Boudjada/dipy,demianw/dipy,maurozucchelli/dipy,JohnGriffiths/dipy,matthieudumont/dipy,villalonreina/dipy,samuelstjean/dipy,FrancoisRheaultUS/dipy,beni55/dipy,FrancoisRheaultUS/dipy,sinkpoint/dipy,jyeatman/dipy,villalonreina/dipy,nilgoyyou/dipy,Messaoud-Boudjada/dipy,StongeEtienne/dipy,rfdougherty/dipy,samuelstjean/dipy