Send ConnectionManager infos to status.html websocket
Delete old properties about clients
Update method sendServerInfo to send data to every status websocket
Delete useless method and property about server info
Reset the methods in applications abstract parent and delete the onUpdate method
Add a onNotification function for applications
Add a notification method to the server for applications
Add emitted events in ConnectionManager for connection and disconnection
Add events to the applications, and send notifications from the ConnectionManager when a client is connected or disconnected
Fix #9: Set the correct method call to update the informations in real time for status users