Graph2vol

[kerautret]

PR Description

New tool to convert graph object into volumetric image.

Checklist

• Doxygen documentation of the code completed (classes, methods, types, members...)
• Check if it follows the tools structure described in CONTRIBUTING.md
• New entry in the ChangeLog.md added.
• Update the readme with potentially a screenshot of the tools if it applies.
• No warning raised in Debug cmake mode (otherwise, Travis C.I. will fail).
• All continuous integration tests pass (Github Actions & appveyor).

[dcoeurjo]

Nice PR again ;)

[dcoeurjo]

So the vertex list is a sequence of points in Z³ ?

[dcoeurjo]

If so, it should be mentioned that the "embedding" of the vertices is explicitly given

[kerautret]

Thanks @dcoeurjo that done and new option to add margin