The PR and media businesses lost giants in 2011. Here are some trailblazers who passed on this year that we'll remember.   Chester Burger
A pioneer in both communications and TV news, he formed Chester Burger & Co. in 1964 and also served as a TV news reporter and editor for CBS, starting in 1946. He also wrote five books on the executive life. Burger died at age 90 last March.   Jack Daly
The SVP of corporate relations and CCO of McDonald's Corporation ...