RE: ConstraintMaker for Autolayout

Isn't that easier to use VFL

NSLayoutConstraint.constraintsWithVisualFormat("V:|-50-[v1]-50-|", options: [], metrics: nil, v1: "subview")
NSLayoutConstraint.constraintsWithVisualFormat("H:|-50-[v1]-50-|", options: [], metrics: nil, v1: "subview")