Long time ago it's was used without prefix to make future switch from boost to std version easier.
I discusses this with Ivan and decide to drop these using from Global.h now.
This change wouldn't break anything because there was already code with prefix for each of three cases.
* battle AIs receive ptr to CBattleCallback (not sure why it was CPlayerBattleCallback, likely mistake)
* reworked some battle callback methods to be more generic and able to handle some hypothetic scenarios
* for testing purposes in duel mode the first AI will be taken fro mconfig and the second will remain stupid ai
* minor changes