Errors fixed

Hello! 

Just an update to say I was recently made aware of an error when reading the PDF in Acrobat or Microsoft Edge. I have now hopefully fixed this, along with providing a plain text version and a PNG of the PDF page. 

Hopefully that helps, and apologises that I was so slow to realise this!
The original blog post remains too, if that's your jam.

Thanks for downloading my things, as always.
Ewen