Add ShowAlert

[Morbix]

public func showAlert(message: String, title: String? = nil, okHandler: ((UIAlertAction) -> Void)? = nil) {
        let alert = UIAlertController(title: title, message: message, preferredStyle: .Alert)
        alert.addAction(UIAlertAction(title: "Ok", style: .Default, handler: okHandler))
        presentViewController(alert, animated: true, completion: nil)
    }