It seems that a new exciting and prosperous new chapter for the NHL Players’ Association has begun. Boston lawyer Paul Kelly, 52, was formally introduced as the union’s new executive director at a news conference yesterday. Paul Kelly is going to replace Ted Saskin. The latter was fired in May amid allegations he ordered the spying of NHLPA player e-mails in the midst of a player uprising against his leadership. A 5-player search committee got help from a Chicago search firm and interviewed a long list of candidates before Paul Kelly was recommended.