Spellcasting improvements

[Admins]

The spell casting has been improved:
- when pressing S to fire the wand, or pressing a hotkey for firing a spell then it is automatically firing into the direction of the mouse or the object below the mouse
- if your spells are locked onto an object and you want to aim other things, press A to unlock
- aiming objects is simplier now since it allows a bigger distance from the mouse to the object (good for aiming running players)
- when aiming monsters it is easier finding the monster since it is only aiming real monsters (not light effects or so), this improvement only works with v4

We will soon change most spells to be able to be directed, effects like fire breathe and lightning will go into the direction your are aiming. They will also be smaller but slightly more powerful.

Another thing we have fixed are the burybag messages which often displayed when another players came close to the object.