NOTES
Notes from development
media-box
How do the doc.media-box and the page.media-box inter-operate?
I don't know for sure yet, but, so far, it's best to set each page's media-box explicitly, rotate if desired to landscape, and adjust page coordinates as necessary to write on the rotated page.
TODO
Incorporate Unicode font handling (use Google Noto fonts) into FontFactory
Split following classes and their associated subs into new files: PDF::X:
FontFactory
DocFont
Consider creating separate modules for them.