* Added hero bonuses for the composite artifacts.
* Angelic Alliance troop mixing implemented.
* Elixir of Life gives regenerating capabilities.
* Power of the Dragon Father gives spell level immunity, though that is still not implemented.
* fixed slider behavior when showing less maps/games than available slots
* added a few missing sounds for creatures
* fixed problems with artifacts info caused by bug in serialization
* fixed bug in Scholar's serializetion
* all stacks features will be serialized (should fix problems with missing premies from artifacts)
* proper serialization of HeroBonus, fixes some problems/crashes
* resource silos won't give resources on the first day
* fixed problems with removing artifacts when all visiblebackpack slots are full
* battle will end when one side has only war machines
* fixed crasbug occurring on revisiting objects (by pressing space)
* started writing support for artifacts
