[SimpleDemo] add a container for the future QrCodes
Add a lib and a function to generate QrCodes
Generate the qr codes after the connection.
Add a new function for getting a url associated with a role
Hotfix : getRoleUrl should now be working as intended
Display the messages received by the browser
[SimpleDemo] Add a close button
[SimpleDemo] tweak UI a bit
[Server] Fix unser input deserialization
Merge branch 'master' into clap

Conflicts:
	Server/SimpleServer/src/main/java/fr/tvbarthel/apps/adaptilo/server/models/enums/EventType.java