DOC added option to write the files as trk
DOC added option to write the files as trk

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