Ajout mut + cross

See merge request !2

# Conflicts:
#   application/main.cpp

Mostly due to a bad vector access in the overriden operator<<

Course implem ++ and several test / assert introduction. Competency operator == and debug on courseTemporalFrameExce

This commit improve the stability of Magnituce. It solve the issue #1 about shallow/direct copy and updating.
It also implements Competency class, and introduce ceao_competency.cpp (and associate cmake modif) to test it.