//execute move take a possible move to execute,
//keep track of it in the breadcrumbs and update coordination
func executeMove(move string, breadcrumbs *mazelib.Stack, visited map[mazelib.Coordinate]bool, co mazelib.Coordinate) (mazelib.Survey, mazelib.Coordinate, error) {
//add the reverse move to the breadcrumbs stack
breadcrumbs.Push(move)
//perform the move
survey, err := Move(move)
//mark the new room as visited
co = co.TranformByMove(move)
visited[co] = true
return survey, co, err
}
