* Brought shared_ptr and unique_ptr and their factories (make_shared, make_unique) to the global scope.
* Removed excessive usage of shared_ptr in bonus system interface.
* Fixed bonus system limiters/caching interactions. That covers #823, #859 and a number of rare edge-cases.
* Implemented multiple-step limiters applying, fixing hasAnotherBonusLimiter and allowing transitional dependencies between bonuses.
* Bonus system should be slightly faster, since we cache limited bonuses. Some rare usages (limiting query against a foreign node) however can't use caching.
-- Adventure map music will update with hero movement
-- implemented battle intro sounds
-- battle music tracks will be selected randomly each time
- fixed#781
