Improvements based on use case partner feedback (#293)

* removed wrongly placed file

* Update README.md

* restructured projects

* Update README.md

* Create README.md

* removed __init__.py

* Create issues.md

* Update issues.md

* Update customize.md

* Update README.md

* Apply suggestions from code review

Co-authored-by: Stefania Pedrazzi <stefaniapedrazzi@users.noreply.github.com>

* Link updated

* Update index.md

* Updated released index

* Update index.md

* Fix old link

* Update test_license.py

* Updated projects path

* Updated links to projects

* Updated links to projects

* Fixed projects path

* pep8 fixes

* Categorized nodes according to their input

* Custom model loading example

* Issues for colab

* Update issues.md

* Update projects/opendr_ws/README.md

Co-authored-by: Stefania Pedrazzi <stefaniapedrazzi@users.noreply.github.com>

Co-authored-by: Stefania Pedrazzi <stefaniapedrazzi@users.noreply.github.com>