Add RaiseException callback - #154

                try
                {
                    ...  
                }
                catch (System.Exception __exception__)
                {
                    CallbackInterface @this = (CallbackInterface)ToShadow<Interface.CallbackInterfaceShadow>(thisObject).Callback;
                    (@this as SharpGen.Runtime.IExceptionCallback)?.RaiseException(__exception__);
                    return default (System.Byte);
                }