Extension for non reusable views

[jakubvano]

I have been pointed to this lib after having created almost the same thing for one of our projects. I have done a couple of things differently, so I thought sharing them here might lead to a productive discussion:

public protocol Loadable {
    static var nib: UINib { get }
}

public protocol Reusable {
    static var reuseIdentifier: String { get }
}

public protocol LoadableCell: Reusable, Loadable {}

Having no direct relation between Loadable and Reusable allows for usage with UIViews designed in xib:

public extension Loadable where Self: UIView {
    static func loadFromNib() -> Self {
        return nib.instantiateWithOwner(nil, options: nil).first as! Self
    }
}

This is of course possible with NibReusable as well, but for simple loading of UIView from UINib name Loadable is a better fit.

Thoughts?

[AliSoftware]

That's actually a great idea. I'd love a PR doing that change!

[AliSoftware]

Closed by #5. Thx again!