Merge pull request #41 from kerautret/3DSDPViewerAdds

3d sdp viewer adds
Merge pull request #42 from kerautret/ChangeLog

changelog and readme
Merge pull request #43 from kerautret/ChangeLog

Change log
Merge pull request #44 from kerautret/ChangeLog

Change log
modif
Merge branch 'master' of github.com:kerautret/DGtalTools into ChangeLog
modif