It isn’t easy being indie. Over the past few years, digital downloads, big box stores, and high rent prices in the District have forced several of the city’s independent record stores to go out of business. Revolution Records in Van Ness shut down in 2006, hoping to move to a better location, the popular DC CD on 18th St. closed its doors several years ago, and Georgetown’s Yoshitoshi, a record label and shop that specializes…