* implement #2357

* misc cleanup

* Replace homepage with GitHub repository link

problem-sets-competitive-programming.md: Replace homepage
link of problembook with github repository link which contains
downloadable pdf links.

* Remove broken links

Remove broken links and update available links from
web.archive.org.

* Update broken link with updated link.

Update the description for the updated link.

* Update broken links with links from web.archive.org

Remove dead links.

* Restore path to original link instead of web.archive.org

The link seems to be working fine. It was not loading
on my network, probably due to regional restrictions.

* Remove github link which is no longer maintained.

Github link consisted of list of Big Data resources.
The repository has been deleted by the user.
Hence deleting the entry.

* Add a book to JavaScript section (Spanish)

Spanish: free-programming-books-es.md

### JavaScript
- [JavaScript, ¡Inspírate!](https://github.com/UlisesGascon/javascript-inspirate)

* New order

New order

* Update broken links

* Small fix

* Update broken link

* Remove problematic links

* Fix according to comments

* Formatting

El enlace del libro "El modelo relacional y el álgebra relacional" ya no funcionaba. Lo actualicé con un nuevo enlace que sí sirve.

Possible fix for broken link.

Fixing broken link.

Suggestion for new link.

The link no longer works.

hhttps -> https

This fixes some 404s by removing them or changing the link if it's moved to a new location or avaliable elsewhere

think like a computer scientist was broken