* Update free-programming-books-fi.md

Fixed a 404 link

* Update free-programming-books-fi.md

Changed the docplayer link to an archive.org link.

* reorganize files

1. make it easier to find files
2. reduce scrolling to get to README on main view of repo

* remove tr.txt again

* Update free-programming-books-fi.md

* Fixed a link to author's own page

Found the original link from author's own page so there's no need to link to ResearchGate.

* Newline fix

* Free Finnish ebooks

* A few more Finnish books

* Added an OpenGL book to the Finnish list

* Added missing newlines and a translation

We had a variety of ways to denote Wikibooks. It seemed appropriate to add "wikibooks" as the "author" and remove "wikibook" from the title, since the books don't use "wikibook" in their titles.