/*
 * Returns a new Imlib2::Border object.
 *
 * Examples:
 *   left, top, right, bottom = 10, 10, 20, 20
 *   border = Imlib2::Border.new left, top, right, bottom
 *
 *   values = [10, 10, 20, 20]
 *   border = Imlib2::Border.new values
 *
 *   edges = {
 *     'left'   => 10,
 *     'right'  => 20,
 *     'top'    => 10,
 *     'bottom' => 20,
 *   }
 *   border = Imlib2::Border.new edges
 */
VALUE border_new(int argc, VALUE *argv, VALUE klass) {