fix issue where lists that didn't start at 1 were not respected (#116)

ansi/elements.go

@@ -129,6 +129,9 @@ func (tr *ANSIRenderer) NewElement(node ast.Node, source []byte) Element {
 		}
 		if node.Parent().(*ast.List).IsOrdered() {
 			e = l
+			if node.Parent().(*ast.List).Start != 1 {
+				e += uint(node.Parent().(*ast.List).Start) - 1
+			}
 		}
 
 		post := "\n"
@@ -153,6 +156,7 @@ func (tr *ANSIRenderer) NewElement(node ast.Node, source []byte) Element {
 		return Element{
 			Exiting: post,
 			Renderer: &ItemElement{
+				IsOrdered: node.Parent().(*ast.List).IsOrdered(),
 				Enumeration: e,
 			},
 		}

ansi/listitem.go

@@ -7,12 +7,13 @@ import (
 
 // An ItemElement is used to render items inside a list.
 type ItemElement struct {
+	IsOrdered   bool
 	Enumeration uint
 }
 
 func (e *ItemElement) Render(w io.Writer, ctx RenderContext) error {
 	var el *BaseElement
-	if e.Enumeration > 0 {
+	if e.IsOrdered {
 		el = &BaseElement{
 			Style:  ctx.options.Styles.Enumeration,
 			Prefix: strconv.FormatInt(int64(e.Enumeration), 10),