Updated #155 for Swift 3 + Merge into postMedia as nullable parameter

Swifter/SwifterTweets.swift

@@ -169,40 +169,15 @@ public extension Swifter {
     - https://dev.twitter.com/rest/public/uploading-media
     - https://dev.twitter.com/rest/reference/post/media/upload
     */
-    public func postMedia(_ media: Data, success: SuccessHandler? = nil, failure: FailureHandler? = nil) {
+    public func postMedia(_ media: Data, additionalOwners: UsersTag? = nil, success: SuccessHandler? = nil, failure: FailureHandler? = nil) {
         let path: String = "media/upload.json"
         var parameters = Dictionary<String, Any>()
         parameters["media"] = media
+        parameters["additional_owers"] ??= additionalOwners?.value
         parameters[Swifter.DataParameters.dataKey] = "media"
 
         self.postJSON(path: path, baseURL: .upload, parameters: parameters, success: { json, _ in success?(json) }, failure: failure)
     }
-
-	/**
-	POST	media/upload
-	
-	Upload media (images) to Twitter for use in a Tweet or Twitter-hosted Card. For uploading videos or for chunked image uploads (useful for lower bandwidth connections), see our chunked POST media/upload endpoint.
-	The parameter "additionalOwners" is corresponding to the optional parameter "addtional_owners" in the twitter's document, which is a comma-separated list of user IDs to set as additional owners allowed to use the returned media_id in Tweets or Cards. Up to 100 additional owners may be specified.
-	
-	See:
-	
-	- https://dev.twitter.com/rest/reference/post/media/upload-init
-	*/
-
-	public func postMedia(media: NSData, additionalOwners: [String], success: ((status: Dictionary<String, JSONValue>?) -> Void)? = nil, failure: FailureHandler? = nil) {
-		guard !additionalOwners.isEmpty else { return }
-
-		let path: String = "media/upload.json"
-		var parameters = Dictionary<String, Any>()
-		parameters["media"] = media
-		parameters["additional_owners"] = additionalOwners.joinWithSeparator(",")
-		print(parameters["additional_owners"])
-		parameters[Swifter.DataParameters.dataKey] = "media"
-
-		self.postJSONWithPath(path, baseURL: self.uploadURL, parameters: parameters, success: { json, _ in
-			success?(status: json.object)
-			}, failure: failure)
-	}
 
     /**
     POST	statuses/retweet/:id