Regis Corporation, whose primary business is owning, operating and franchising hair salons, reported declines for its fiscal second quarter ended Dec. 31, 2013.   Sales fell 7.5% to $468.4 million, while. same-store sales declined 6.2%. Same-store service and product sales declined 5.5% and 9.2%, respectively.   In other news, in the past few months, Regis has staffed two “critical” positions, according to the company—Chief Operating Officer Jim Lain and its first- ever chief human resources off...