Clear out GTM chaff as used by PG Australia; add tips to documentation

[dwids]

Thanks for the software suite, it's excellent.

I see that some older HTML books on PG Australia (PGA), like His Prey Was Man, have some items which seem to cause issues with ebookmaker. It didn't take long to find a quick work around via manually editing the html file:

1. Remove everything between

<!-- Google tag (gtag.js) -->
...and
<!-- End Google Tag Manager -->

including the two <!--...> lines

2. Save and then process the updated file in ebookmaker. It should then work.

Other Notes

• I use the Download Them All browser add-on to grab the images from the PGA page
• Under Windows 10, WSL (Ubuntu 22.xx) works very well with ebookmaker. I found the installation steps worked very well, with one or two minor changes...happy to document these if you want.
• From native Windows you can directly access (and copy/delete) Ubuntu files. From Windows Explorer, I go to \\wsl.localhost\Ubuntu-22.04\home\user where user is your Windows 10 user name, like david . It's easy to copy the images from Windows to Ubuntu - for ebookmaker to use - then copy the new epubs back.

[eshellman]

shoudn't be hard to remove whatever was causing the problem

[dwids]

Thank you