message: Add Broadcast API
diff: @@ -816,10 +816,7 @@ function Facebookbot(configuration) {
  });
  };
  -
  -
  -
  -
  + var broadcast_api = {};
  facebook_botkit.api = {
  'user_profile': user_profile,
  @@ -828,12 +825,10 @@ function Facebookbot(configuration) {
  'attachment_upload': attachment_upload_api,
  'nlp': nlp,
  'tags': tags,
  + 'broadcast': broadcast_api
  };
  -
  -
  -
  // Verifies the SHA1 signature of the raw request payload before bodyParser parses it
  // Will abort parsing if signature is invalid, and pass a generic error to response
  function verifyRequest(req, res, buf, encoding) {
  