Actualisation de la classe PHP Visite_class

Ajout getter / setter et constructeurs
ajout tache a faire
Merge pull request #11 from Rayvexx/gael

ajout tache a faire
ajout class connexion bdd
Merge branch 'master' of https://github.com/Rayvexx/Projet_annuel
Maj accesseurs des objets
Merge branch 'master' of https://github.com/Rayvexx/Projet_annuel into gael
Merge branch 'gael'
modif class pdo
Merge pull request #12 from Rayvexx/master

MaJ
Mise à jour de la classe Visite
Merge pull request #13 from Rayvexx/Baptiste

Merge pull request #12 from Rayvexx/master
Merge pull request #14 from Rayvexx/master

MAJ
Correction class visite
Merge pull request #15 from Rayvexx/Baptiste

Baptiste
Merge pull request #17 from Rayvexx/master

mise à jour branche