Alt text

I received an email regarding alt texts. I will investigate how tricky this would be to implement in an automated fashion.

```a small issue with Yoast SEO not recognizing the alt text of header images using your plugin. Do you think there is a way to go about this? Yoast offer this article:
https://developer.yoast.com/customization/yoast-seo/adding-custom-data-analysis/```