Fxed an issue with random encounters, added a repeatable property, add event for abandoning encounters

Runtime/IEncounter.cs

@@ -46,8 +46,9 @@ namespace Jovian.EncounterSystem {
         public Sprite encounterArt;
     }
 
-    [Serializable]
+     [Serializable]
     public class EncounterProperties {
         public int difficulty;
+        public bool isRepeatable = true;
     }
 }