First branch commit
Merge branch 'master' into user-creation
Second branch commit
Third commit
Merge branch 'master' into user-creation
Uses the email address instead of the firstname for the user authentication (part 1)
Merge branch 'master' into user-creation
Uses the email address instead of the firstname for the user authentication (part 2)
Uses the email address instead of the firstname for the user authentication (part 3)
DRY up the login form
Merge pull request #3 from WilfriedDeluche/user-creation

User creation, part 1 (preparation : changes in authentication)
Solves conflicts