Merge pull request #257 from cnoon/master

Fixed issue where directory and domain parameters were ignored.

Source/Alamofire.swift

@@ -1161,7 +1161,7 @@ extension Request {
     public class func suggestedDownloadDestination(directory: NSSearchPathDirectory = .DocumentDirectory, domain: NSSearchPathDomainMask = .UserDomainMask) -> DownloadFileDestination {
 
         return { (temporaryURL, response) -> (NSURL) in
-            if let directoryURL = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)[0] as? NSURL {
+            if let directoryURL = NSFileManager.defaultManager().URLsForDirectory(directory, inDomains: domain)[0] as? NSURL {
                 return directoryURL.URLByAppendingPathComponent(response.suggestedFilename!)
             }