GitLab

* Add tasks_explained.md to es/

* Fix little typo in en/ version

* translate speach/audio section

* translate part of vision computer section | fix little typo in en/

* Fix little typo in en/

* Translate vision computer section | remove ** ** to * * in both files

* Translate NLP section | fix link to task/translation in en/

* Updete link in es/tasks_summary.md

* Fix task_summary title link