A decade after one of the 21st century’s biggest boy bands was first founded, a quartet of rarity-packed digital EPs is now available to commemorate British pop sensations One Direction. To mark the exact 10th anniversary of X Factor contestants Zayn Malik, Harry Styles, Louis Tomlinson, Niall Horan and Liam Payne joining forces as a vocal group (where they ultimately placed third on the singing competition), Sony Music has unearthed and collated some spare tracks from across their career: Acoustic, featuring five stripped-down takes on favorites like “One Thing,” “Steal My Girl” and “Night…