     /**
      Adds the API Key as a query parameter to the request.
      
-     - parameters:
-        - request The outbound NSMutableURLRequest.
+     - parameter request: The outbound NSMutableURLRequest.
      */
     func addAPIKey(request: NSMutableURLRequest) {
         if let urlString = request.URL?.absoluteString, urlComponents = NSURLComponents(string: urlString) {

     Adds a signature to the authorization header of the outbound request.
     
     - parameters:
        - request The outbound NSMutableURLRequest.
        - timestamp The timestamp used to generate the signature.
     */
    func addSignature(request: NSMutableURLRequest, timestamp: String) {
        if let signature = generateSignature(request, timestamp: timestamp) {

     Generates an authentication code using HMAC-SHA256.
     
     - parameters:
        - request: The outbound NSMutableURLRequest used to generate the signature.
        - timestamp: The timestamp used to generate the signature.
     
     - returns: The encoded signature.
     */
