Improves Hero class to allow an easier use of it and uptades main.py.
Removes useless operations in Hero.move().
Factorizes Hero.update() by using Hero.update_now().
Corrects some mistakes in class Hero.
Corrects some remaining mistakes.
Merge branch 'hero_improvements'

Conflicts:
	src/classes/hero.py
	src/classes/settings.py
	src/main.py