* Update 1 book URL in free-programming-books-id.md

Update URL for Pemrograman Kompetitif Dasar

* Add new MongoDB book at free-programming-books-langs.md

Added MongoDB Notes for Professionals

* Added Git for Professionals Tutorial at free-courses-en.md

Git for Professionals Tutorial - Tools & Concepts for Mastering Version Control with Git

* Added Git & GitHub tutorial playlist at free-courses-en.md

* Adding credit to the instructor

* Added Deep Learning with PyTorch course in free-courses-en.md

* Set theme jekyll-theme-cayman

* Revert "Set theme jekyll-theme-cayman"

This reverts commit 1287e0bb4a024af82471289579189ebcd81fdfce.

* Added 7 courses at free-courses-id.md

* Fix courses alphabetical ordering

* Added index for new categories