Hide ugly error on missing savegame

and display a nice error message instead
Refactoring and Equipment

+ added function getUID of type int to replace getUID of type String
+ added boolean physic to determine if physic or magic damage
+ added double getDamage()
+ added function to equip a weapon (unfinished)
= changed getUID from type String to UIDtoString of type String
- removed double[] getDamage