a) Adding a drop down combo box where user can select the direction {X,Y,Z} of the Vessel.
b) Adding an experimental option {Auto} for the direction of the vessel. In this mode, all 3 directions will be checked and the largest (by voxel count) resulting vessel would be selected.
New features seem to provide a substantial improvement in usability and quality of the result. F.e. in liver, we would like to always work in Axial projection where the Portal Vein direction is often along {X,Y} axis.
So in new version, user does not have to choose the direction of the vessel. So for portal vein the "Auto" direction is set by default.Another change is that the seed does not have to cover the vessel. Instead, it is only assumed that the center of the seed should be very close to the vessel in question.
