gui-plot interactivity. make tract brush optional.
gui-plot interactivity. make tract brush optional.

richford/AFQ-Browser,arokem/AFQ-Browser,arokem/AFQ-Browser,yeatmanlab/AFQ-viz,richford/AFQ-Browser,yeatmanlab/AFQ-Browser,arokem/AFQ-Browser,yeatmanlab/AFQ-Browser,yeatmanlab/AFQ-viz,richford/AFQ-Browser,yeatmanlab/AFQ-Browser,richford/AFQ-viz,richford/AFQ-viz