11-file-2-document.md: Remove link to slide version
11-file-2-document.md: Add notes

* Add notes on desktop word processors
* Add notes on 'roff'-type utilities
Update 05-resources.bib
Complete 10-bit-deckset.md
Update 11-file-2-document.bib
Create 11-file-1-slides.md
11-file-2-document-slides.md