Record killers and kills

Engine/src/live/AnimalEntity.ts

@@ -17,6 +17,7 @@ export class AnimalEntity extends Entity {
   nextWander: number = 100 // Time to next wander.
   smelledTarget?: Entity
   seenTarget?: Entity
+  killer?: AnimalEntity
   def: AnimalDefinition
   mode: CreatureDefinition
   desiredActions: Action[] = []
@@ -26,6 +27,7 @@ export class AnimalEntity extends Entity {
   dead: boolean = false
   shouldGib: boolean = false
   actionCooldown: number = 0
+  kills: number = 0
 
   constructor(def: AnimalDefinition) {
     super(`${def.name}.animal.stand.west.0`)
@@ -342,6 +344,8 @@ export class AnimalEntity extends Entity {
           if (Math.random() > 0.5) {
             this.yell(1)
           }
+          entities[0].killer = this
+          this.kills++
         } else {
           // growl if there are no targets.
           this.yell(1)