That's the way the New Town crumbles.The fifth-largest homebuilder in the St. Louis region has filed for bankruptcy. St. Charles-based Whittaker Homes filed Chapter 11 bankruptcy last week. The company, headed by Greg Whittaker, is perhaps best known for its massive new-urbanist development -- New Town -- in St. Charles. According to the St. Louis Business Journal, revenue at Whittaker Homes has declined sharply in recent years from $93.3 million in 2006, to $29.2 million in 20