Modification de la base de donnée
Merge branch 'master' of https://github.com/CASIRIUTGR4/casir-messenger

Conflicts:
	messenger.db
Merge branch 'master' of https://github.com/CASIRIUTGR4/casir-messenger

Conflicts:
	.nfs0000000000e608c30000003c
Merge branch 'master' of https://github.com/CASIRIUTGR4/casir-messenger

Conflicts:
	casir_messenger/settings_dev.py
	snapchat/models.py
- Création d'une page de presentation
- Corection mineur dans fichier base.html
- Ajout redirection vers page de presentation
Merge branch 'master' of https://github.com/CASIRIUTGR4/casir-messenger