Moved id into base entity

lib/server/entities/entity.js

@@ -1,9 +1,9 @@
 exports = module.exports = Entity;
 
-function Entity () {
+function Entity (id) {
     this.state;
     this.sequence = 1;
-    this.id;
+    this.id = id;
     this.stateHistory = [];
 }
 

lib/server/entities/player.js

@@ -3,9 +3,8 @@ var Entity = require('./entity');
 exports = module.exports = Player;
 
 function Player (client) {
-    Entity.call(this);
+    Entity.call(this, client.id);
     this.client = client;
-    this.id = client.id;
     this.inputs = [];
 }