GitLab

Summary:
cc mthrok

Pull Request resolved: https://github.com/pytorch/audio/pull/2116

Reviewed By: mthrok

Differential Revision: D33368453

Pulled By: jdsgomes

fbshipit-source-id: 09cf3fe5ed6f771c2f16505633c0e59b0c27453c

* Refactor tutorial organization

* Merge tutorial subdirectoris under to examples/gallery/tutorials
* Do not use index.rst generated by Sphinx-gallery
* Instead use flat structure so that all the tutorials are listed in left menu
* Use `_assets` dir for artifacts of tutorials

fix 'file-does-not-end-in-newline' and typo.

Co-authored-by: krishnakalyan3 <skalyan@cloudera.com>

* Clean up extension build mechanism and extension location

* Add back the switch to depend on external sox

* Remove print

* Fix