By Denny Dyroff, Entertainment Editor, The Times Firebird Festival There are four outdoor event which might be easy choices for those willing to brave the winter conditions – Phoenixville’s Firebird Festival, “Astra Lumina Philadelphia” and “Freeze” events in Holmes and Manayunk. Phoenixville’s annual Firebird Festival (Veterans Field, 192 Mowere Road, Phoenixville, www.firebirdfestival.com)...