Untested Generic Nib Loader

GenNib.swift

extension UINib {
    static func Build<View: UIView>(nibName: String? = nil, bundle: NSBundle? = nil) -> View {
        let typeName = String(Mirror(reflecting: View).subjectType)
        
        let nibName: String = nibName ?? typeName
        let nib = UINib(nibName: nibName, bundle: bundle)
        
        for object in nib.instantiateWithOwner(nil, options: nil) {
            if let view = object as? View {
                return view
            }
        }
        preconditionFailure("View of type \(typeName) not found in nib \(nibName)")
    }
}