The National and Lorde are among a bevy of artists who will be taking place in the September edition of the annual Boston Calling festival. The lineup was announced just a short time ago, and also performing this year will be The Replacements, Nas, The Roots, Neutral Milk Hotel, Childish Gambino, Spoon, Girl Talk, The 1975, Twenty One Pilots, The War On Drugs, The Hold Steady, Sky Ferreira, San Fermin, and hometown favorites Gentlemen Hall. The September edition will take pla