BF: Test this on all Travis configurations, with scipy NNLS.
BF: Test this on all Travis configurations, with scipy NNLS.

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