Added some menu facilities: Changing the competence options.
 On branch master
 Changes to be committed:
	modified:   bin/Debug/schoolMarkLogger
	modified:   bin/Release/schoolMarkLogger
	modified:   competence.cpp
	modified:   competence.hpp
	modified:   main.cpp
	modified:   menu.hpp
	modified:   school_year.cpp
	modified:   school_year.hpp
	modified:   user.cpp
	modified:   user.hpp