(This is the third installment of a multi-part series focusing on the plight of families in transition and the resources available to help them) Recently, Rockdale is seeing the results of years of discussion and planning around helping homeless families come to fruition - and just in time. Although numbers can be hard to determine, a report by the Georgia Department of Community Affairs found about 21,000 people across the state were homeless on a single night in January 2009 - about 20 percent more than in 2008 - and that about half of those did not have shelter. About half the people