IBM Swift Sandboxでサードパーティのパッケージを使用する簡単な方法 ref: http://qiita.com/naokits/items/ff34d0ab0c7962828eef

file0.txt

├── .swift-version
├── Package.swift
└── Sources
    └── main.swift

file1.txt

DEVELOPMENT-SNAPSHOT-2016-05-09-a 

file2.swift

import PackageDescription

let package = Package(
    name: "examples-for-ibm-swift-sandbox",
    dependencies: [
        .Package(url: "https://github.com/IBM-Swift/SwiftyJSON.git", majorVersion: 8),
        .Package(url: "https://github.com/IBM-Swift/BlueCryptor.git", majorVersion: 0, minor: 2),
        .Package(url: "https://github.com/IBM-Swift/HeliumLogger.git", majorVersion: 0, minor: 9)
            ]

file3.swift

import Foundation
import SwiftyJSON

func JSONExample() {
    let json = JSON(["name":"naokits", "age": 50])

    if let name = json["name"].string {
        print(name)
    }

    if let age = json["age"].int {
        print(age)
    }
}

JSONExample()