This module implements all concepts defined by the Getting Things Done methodology.
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This module implements a simple personnal Todo list based on tasks. It adds in
the project application an editable list of tasks simplified to the minimum
required fields.

The todo list is based on the GTD methodology. This world-wide used methodology
is used for personal time management improvement.

Getting Things Done (commonly abbreviated as GTD) is an action management
method created by David Allen, and described in a book of the same name.

GTD rests on the principle that a person needs to move tasks out of the mind by
recording them externally. That way, the mind is freed from the job of
remembering everything that needs to be done, and can concentrate on actually
performing those tasks.