Add support for struct slices

This commit continues the work done in #205 by adding support for slices of structs.
Closes #197

unmarshal.go

@@ -150,6 +150,12 @@ func unmarshalSlice(s *goquery.Selection, selector, htmlAttr string, attrV refle
 			UnmarshalHTML(someVal.Interface(), innerSel)
 			attrV.Set(reflect.Append(attrV, someVal))
 		})
+	case reflect.Struct:
+		s.Find(selector).Each(func(_ int, innerSel *goquery.Selection) {
+			someVal := reflect.New(attrV.Type().Elem())
+			UnmarshalHTML(someVal.Interface(), innerSel)
+			attrV.Set(reflect.Append(attrV, reflect.Indirect(someVal)))
+		})
 	default:
 		return errors.New("Invalid slice type")
 	}

unmarshal_test.go

@@ -99,3 +99,31 @@ func TestPointerSliceUnmarshall(t *testing.T) {
 	}
 
 }
+
+func TestStructSliceUnmarshall(t *testing.T) {
+	type info struct {
+		Text string `selector:"span"`
+	}
+	type object struct {
+		Info []info `selector:"li.info"`
+	}
+
+	doc, _ := goquery.NewDocumentFromReader(bytes.NewBuffer(pointerSliceTestData))
+	e := HTMLElement{DOM: doc.First()}
+	o := object{}
+	err := e.Unmarshal(&o)
+	if err != nil {
+		t.Fatalf("Failed to unmarshal page: %s\n", err.Error())
+	}
+
+	if len(o.Info) != 2 {
+		t.Errorf("Invalid length for Info: %d, expected 2", len(o.Info))
+	}
+	if o.Info[0].Text != "Info 1" {
+		t.Errorf("Invalid data for Info.[0].Text: %s, expected Info 1", o.Info[0].Text)
+	}
+	if o.Info[1].Text != "Info 2" {
+		t.Errorf("Invalid data for Info.[1].Text: %s, expected Info 2", o.Info[1].Text)
+	}
+
+}