 	/**
 		:name:	size
 	*/
-	public static func size(parent: UIView, child: UIView, width: CGFloat, height: CGFloat) {
+	public static func size(parent: UIView, child: UIView, width: CGFloat = 0, height: CGFloat = 0) {
 		Layout.width(parent, child: child, width: width)
 		Layout.height(parent, child: child, height: height)
 	}

	/**
		:name:	height
	*/
	public static func height(parent: UIView, child: UIView, height: CGFloat) {
		let metrics: Dictionary<String, AnyObject> = ["height" : height]
		let views: Dictionary<String, AnyObject> = ["child" : child]
		parent.addConstraints(constraint("V:[child(height)]", options: nil, metrics: metrics, views: views))

	/**
		:name:	alignFromBottomLeft
	*/
	public static func alignFromBottomLeft(parent: UIView, child: UIView, bottom: CGFloat = 0, left: CGFloat = 0) {
		let metrics: Dictionary<String, AnyObject> = ["bottom" : bottom, "left" : left]
		let views: Dictionary<String, AnyObject> = ["child" : child]
		parent.addConstraints(constraint("H:|-(left)-[child]", options: nil, metrics: metrics, views: views))
