name prop was undefined warning with Markdown text

[marvinhagemeister]

The <Examples> Component throws a PropType error when the markdown contains headings or other markdown specific components. In that case the name property is undefined.

The name property is only required when rendering actual user components. See: https://github.com/sapegin/react-styleguidist/blob/master/src/rsg-components/Examples/Examples.js#L9