Merge pull request #2 from akdiallo/akd_branch

First merge
ChangeTextOfButton
Merge pull request #3 from amsonko/amsonkobranch

ChangeTextOfButton
created model classes: Employee, Administrator and Person
hello
Merge pull request #4 from milouta/loulou_branch

hello
Authenttification
merge done
merge2
Merge pull request #6 from amsonko/amsonkobranch

Amsonkobranch
Merge https://github.com/akdiallo/AppScool into akd_branch
Presenter added