A More Swifty way to use storyboards

##Motivation: Take a look at the code below:

let storyboard = UIStoryboard(name: "Main", bundle: nil)
let controller = storyboard.instantiateViewControllerWithIdentifier("Settings") as! SettingsViewController

Such code has 2 disadvantages:

• Storyboard name is raw string
• Controller identifier is raw string

We want to get rid of that. SwiftyStoryboard allows to deal with both of there problems in one shot.

##Usage example We create a struct that conforms to Storyboard protocol like this one:

struct Main: Storyboard {
    enum ControllerId: String {
        case Settings
    }
}

and now we can instantiate out controller with specific identifier like this:

let controller: SettingsViewController = Main.instantiateViewController(with: .Settings)

Such approach allows us to distinguish different storyboards with different controller identifiers and give more information to compiler about our storyboards.

SwiftyStoryboard by deafult take the the type name as the name of the storyboard file. For example, in this case it will take Main.storyboard as the name of the type is Main