config.title          = "MDLinks";
config.source         = "example_links.txt";
config.columns        = 3;
config.narrow         = 500; // less than N pixels window results in single column
config.favicon        = null; // link to favicon
config.style          = null;  // link to style file
config.foldCategories = true; // in single column mode (< narrow width) fold out-of-screen categories