RF - Fixed one last bug with Tensor class in dti.py ... tested the class
RF - Fixed one last bug with Tensor class in dti.py ... tested the class

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