Deleted /fs because it is the old version of the project and no longer used
Moved various notes and todos to /doc
Moved non-essential shell scripts from / to /shell_utils
Deleted /gpio_tests because they aren't used in the project
Visual guide in PDF format in horizontal and vertical format.
The objective of the guide is to be understandable by users
and not bound to a specific language. The work is part of the
task TDOC-1.
The guides are licensed under CC-BY-SA.