Update of TrackVertexUtils
Added several vertexing functions to TrackVertexUtils. Added keywords final to many virtual functions in TrackTraj and CubicState(Vector)InterpolationTRaj to aid in devirtualization.
Added several vertexing functions to TrackVertexUtils. Added keywords final to many virtual functions in TrackTraj and CubicState(Vector)InterpolationTRaj to aid in devirtualization.