Mage half done

mage is hald done.
fix some bug in maigic_immunity,boost.
skills have different background color.
Skill can display Hotkey

Database.get_actor_pic will create new surface.
add blending function on instance of Surface.
delete some useless config.
Class remake plan started

A commit.
Before Reconstruct

Add a race 'leopard cat ear' with skill 'Cat Emperor Time' reduces
damage.
Classes and skills will be recontruct later.
And saving leopard cats is important.