merging in one constructor with default option
Merge pull request #4 from kerautret/widthShortcutOption

add width simplification option
untrack not useful files
Merge pull request #5 from kerautret/minorClean

untrack not useful files
update  illustrArtIPOL_ExtrConnectedReg for compatible DGTal 0.6 (deprecated SetPredicate)
cleaning
reload travis
Merge pull request #6 from kerautret/IllustationDGtal0.6

Illustration dgtal0.6
merge with master
add error message in example file
add a line with width only in the example file