Modifications des constructeurs et l'ajout d'une méthode
Ajouts : Méthode affiche, surcharge de << , méthode toString et divers modifications
Merge branch 'modification' of https://github.com/HAmazigh/editeur-web into modification

Conflicts:
	ligne.cc
Modifications : Ajout méthodes affiche, surcharge << ...
continuation du travail
Modifications : surcharge <<, méthode toString...
Merge pull request #23 from Memedsmile/dom

dom(list)
Merge branch 'master' of https://github.com/hugodes/editeur-web into buffer
Merge branch 'master' into modification
Merge branch 'modification' of https://github.com/HAmazigh/editeur-web into modification
Merge pull request #24 from HAmazigh/modification

Modification ligne.cc
modification type de retour toString
Merge branch 'master' of https://github.com/hugodes/editeur-web into buffer
Update facteur.cc

Commentaires doxygen
Surcharge operateur <<
Merge pull request #25 from HAmazigh/modification

modification type de retour toString
Merge branch 'master' of https://github.com/hugodes/editeur-web into buffer
Update facteur.h

Commentaires doxygen
Surchage operateur <<
Merge branch 'master' of https://github.com/nicolas-emeri/editeur-web into nicolas-emeri-master
Merge branch 'master' of https://github.com/hugodes/editeur-web

Conflicts:
	facteur.cc
	facteur.h
Merge branch 'master' into buffer