Hundreds more of Hondurans have joined a caravan of migrants moving toward the country’s border with Guatemala in a desperate attempt to flee poverty and seek new lives in the United States. Dunia Montoya, a volunteer assisting the migrants, said Sunday that the group had grown to an estimated 1,600 people from an initial 160 who first gathered early Friday in a northern Honduras city. Caravan participants planned to spend Sunday night at a commu…