ENH: Improved user experience with vtk phylo app.

Add "cursor wait" to vtk-phylo-app.
Allow drag-and-drop multiple files.
Also cleaned up some unused scripts.
Merge branch 'vtkPhyloApp'

* vtkPhyloApp:
  ENH: Improved user experience with vtk phylo app.

Conflicts:
	vtk-phylo-app/vtk_phylo.js