ConvexBranchesDecomposition: add a utility to build branch graph.

And put some more javadocs.
Signed-off-by: Jean-Yves Tinevez <jean-yves.tinevez@pasteur.fr>
Exploit the layout in branches for "complicated" tracks.

Tracks that have merging points always were a mess to arrange in
TrackScheme. This makes it slightly better.
Signed-off-by: Jean-Yves Tinevez <jean-yves.tinevez@pasteur.fr>
Add an outline panel in TrackScheme.

Super useful. Cost minimal.
Signed-off-by: Jean-Yves Tinevez <jean-yves.tinevez@pasteur.fr>
Merge pull request #35 from fiji/trackscheme-new-layout

Trackscheme new layout