adding location stuff

PeopleVille/Location/ILocation.cs

@@ -1,7 +1,11 @@
+using PeopleVille.Persons;
+
 namespace PeopleVille.Locations
 {
     public abstract class Location
     {
         public string Name { get; set; }
+
+        public virtual void UseLocation(Person person) {}
     }
 }

PeopleVille/Person/Person.cs

@@ -26,6 +26,7 @@ namespace PeopleVille.Persons
         public void Walk(Location newLocation)
         {
             this.CurrentLocation = newLocation;
+            newLocation.UseLocation(this);
         }
     }
 }