Update models with more functionality

This is a small commit that aims to add some more descriptive
functionality to the models.

Guest now has more creditcard information
such as CCV and an expiration date to bring it in-line with what would
be expected.

Reservation implemented a very loose cancellation function,
this may be moved out.

Transaction has a few more tweaks that follows the same goal as guest,
however this functionality may be migrated as well.

OpheliasOasis/Models/Reservation.cs

@@ -48,14 +48,16 @@ namespace Ophelias.Models
             CheckOut = null;
             DateChanged = null;
         }
-        internal void ChangeReservation(ReservationType type)
+        internal void ChangeReservation(ReservationType type, Transaction t, BaseRate b)
         {
             Status = ReservationStatus.Changed;
             Type = type;
+            t.Penalize(this, b.Rate);
         }
-        internal void CancelReservation()
+        internal void CancelReservation(Transaction t)
         {
             Status = ReservationStatus.Cancelled;
+            t.Penalize(this);
         }
     }
     internal enum ReservationStatus