SwiftHTTP 介绍
SwiftHTTP 简单封装了 Swift 语言中的 NSURLSession ，简化了 HTTP 请求操作。
示例代码：
var request = HTTPTask()
request.GET("http://www.oschina.net/", parameters: nil, success: {(response: AnyObject?) -> Void in
if response {
let data = response as NSData
let str = NSString(data: data, encoding: NSUTF8StringEncoding)
println("response: \(str)") //prints the HTML of the page
}
},failure: {(error: NSError) -> Void in
println("error: \(error)")
})