[BLEUNW/EVENTS]: introducing :bleunw and :bleunw events management.
[YAGGLER/GLFW_WINDOW]: added an advanced getter for the glfw handler.
[KLMB/MATERIAL/WRAPPER]: added 'final' to 'final' functions (in the 'spec subclass)
[KLMB/OBJECT/DEFAULT_OBJECTS]: added an __attribute__((unused)) to remove that g++ warning.
[KLMB/SAMPLE/TEST]: the sample now also exit with the escape key