* 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
* Fixed crashes in battles after loading game
* Fixed crash in battle AI, when stack is blocked and stands next to an enemy
* Fixes problem when server's moveStack is called with dest==position
* Above should cover #1053.
* Updated MSVC project files
* Filesystem: My version of .SND archive does not have \0 after WAV extension. Fixed (though hardcoded 3-char extension length).
* New bonus types: BLOCK_MAGIC_ABOVE for blocking casting spells above given level and BLOCK_ALL_MAGIC for blocking all magic.
* Heavy rewrite of battle callbacks. Fixed some minor bugs. Code reusage between lib/client/server (removed proxy calls). Better access control and support for various perspectives.
* Fixed#1031
* Fixed Orb of Inhibition and Recanter's Cloak (they were incorrectly implemented). Fixed#97.
* Fleeing hero won't lose artifacts. Spellbook won't be captured. Fixed#980.
* Fixed crash when attacking stack dies before counterattack (ie. because of Fire Shield)
* Server does some basic checks if action requests during battle are valid
* Minor stuff.
