Adding a notion of instances per mapAdding a notion of instances to room

The URL signature becomes:

https://workadventu.re/_/[instance]/[path_to_map.json]

This allows us to create many instances of the same map (and therefore to create several different worlds for different people)

An exit on a map can target another "instance" by passing the "exitInstance" property.

front/src/Phaser/Player/Player.ts

@@ -45,12 +45,6 @@ export class Player extends PlayableCaracter implements CurrentGamerInterface, G
         this.setImmovable(false);
         this.initAnimation();
 
-        console.warn("Start direction for added player ", direction)
-        console.warn("Position ", x, y)
-        /*this.play(`${PlayerTexture}-${direction}`, true);
-        if (!moving) {
-            this.stop();
-        }*/
         this.playAnimation(direction, moving);
     }