This week the stage at the Boulder Theater was eclipsed by the looming shadow of a performer with a gigantic reputation, one who has been in the spotlight for over three decades.  Dressed in his signature black jeans and black tee, Henry Rollins took center stage, adopted a rocker-like stance, and firmly wielded his weapon of choice: the microphone.  Initially it was difficult hard to behold this lone veteran of guitar rock without a metal band backing him up.