An illustration picture shows the log-on icon for the Website Facebook and Twitter on an Ipad in BordeauxVia Emily Stephenson WASHINGTON (Reuters) – Regulators said on Tuesday that firms can use Twitter, Facebook and other social media to make key bulletins so long as they inform traders which sites they will use, an effort to assist corporations navigate the new media age. The steering from the Securities and ExChange Fee seeks to make clear disclosure ideas after the company opened an inquiry into a post made remaining July on the private Fb page of Netflix's chief executive, Reed Hastings. …