More changes at the magic system

Today there were another set of changes of the magic system. All of these changes have their core in a bug that caused the fact that humans were able to cast every spell at around 60% of the skill and elves even at 50%. This bug caused that many trouble that also the whole calculation of magic resistance was affected and infunctional.

And exactly this bug is fixed now. The effects are that the spells of mages will be alot weaker for the most mages. Also the magic resistance should work now far better. At least in the player-versus-player fight and in the fight versus monsters in case the player is the mage.