To avoid a sale, Anchor Bank has agreed to add a real estate broker and current Zillow director to the small Washington-based bank's board. Gordon Stephenson, co-founder and CEO of Seattle real estate brokerage Real Property Associates, will join the bank's board. He's one of the original members of Zillow's (Nasdaq: Z, ZG) board of directors. Anchor Bank has been the target of two activist investor campaigns in the last year. Most recently, a firm run by New York-based Joseph Stilwell...