Implemented other algorithms apart from Powell's method
Implemented other algorithms apart from Powell's method

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