MISC: Better Readme file

Fixed typos, detailed sources, etc.

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
MISC: Better doxygen configuration file

- Fixed short names issues
- Warning changes
- Configured diagrams generation to make them look like UML
COMMENTS: Fixed comments to be properly parsed by Doxygen

Missing vertical spaces lead to bad function parameters documentation.

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
SCRIPTS: Added license text + copyright to existing script

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
SCRIPTS: Added scripts for generators

- Added a "common" file holding all Python generators utilities
- Added a script for Triangle signal generator

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
GENERATORS: Better constness for One pole filter class members

This filter is supposed to have constant coefficients:
this is now checked syntaxically.

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
GENERATORS: Fixed Triangle signal generator inheritance scheme

All generators are supposed to inherit from common generators interface.

Signed-off-by: Gama <misept.dieseneuf@gmail.com>