Exclusive: Thomas Schatz's latest book, "Power Surge: Conglomerate Hollywood and the Studio System's Last Hurrah," examines a period of seismic change in the studio system, one in which an indie ethos permeated. While media consolidation isn’t anything new — just look at literally the last week of stories in the entertainment industry — but it does tend to come in waves. Before the merger madness around Warner Bros., Paramount, and Netflix, there was Hollywood’s “Conglomerate Era,” from 1989 to