func addSubviewAndFill(subview: UIView, edgeInsets: UIEdgeInsets = UIEdgeInsets.zero) {
	self.addSubview(subview)
	subview.translatesAutoresizingMaskIntoConstraints = false
	self.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|-(\(edgeInsets.left))-[view]-(\(edgeInsets.right))-|", metrics: nil, views: ["view": subview]))
	self.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|-(\(edgeInsets.top))-[view]-(\(edgeInsets.bottom))-|", metrics: nil, views: ["view": subview]))
}