Update for swift 3.

- Convert code to swift 3
- Update alamofire to 4.0.1 for swift 3.

ShadowsocksX-NG/Utils.swift

@@ -11,17 +11,17 @@ import Foundation
 
 extension String {
     var localized: String {
-        return NSLocalizedString(self, tableName: nil, bundle: NSBundle.mainBundle(), value: "", comment: "")
+        return NSLocalizedString(self, tableName: nil, bundle: Bundle.main, value: "", comment: "")
     }
 }
 
 
-extension NSData {
+extension Data {
     func sha1() -> String {
         let data = self
-        var digest = [UInt8](count:Int(CC_SHA1_DIGEST_LENGTH), repeatedValue: 0)
-        CC_SHA1(data.bytes, CC_LONG(data.length), &digest)
+        var digest = [UInt8](repeating: 0, count: Int(CC_SHA1_DIGEST_LENGTH))
+        CC_SHA1((data as NSData).bytes, CC_LONG(data.count), &digest)
         let hexBytes = digest.map { String(format: "%02hhx", $0) }
-        return hexBytes.joinWithSeparator("")
+        return hexBytes.joined(separator: "")
     }
-}
+}