Warnings fixes
* Suppress `missing-braces` for Clang
* Fixed many C4275 warnings
* Fixed almost all Clang/GCC warnings
* Silence most frequent MSVC warning.
* Fixed some pessimizing-move warnings
* Fixed some unused capture warnings
* Node graph initialization optimized.
* Fixed "Unathorized obstacle access".
* Pathfinding tracing disabled with ifdef.
* Misc bonus calculation optimizations.
* Removed timestamp from log lines. Date formatting eats too much CPU.
* Paths for all heroes in Client are now cached
* Universities, Scholars and Witch Huts may offer new skills
* Moved encode/decodeSkill to CSkillHandler
* Refactored CSkill interface and CSkill::LevelInfo image storage
* Legacy game constants renamed to ORIGINAL_XXX_QUANTITY
* changed Bonus::additionalInfo to integer vector
* fixed deserialization for old savegames
* removed newline from JsonNode::toJson()
* updated bonus schema; SPELL_AFTER_ATTACK and SPELL_BEFORE_ATTACK use new addInfo format
* removed unnecessary init in Bonus constructor
* Indirect spell effects loading
* Json serializer improvements
* spell->canBeCastAt do not allow useless cast for any spell
* Added proxy caster class for spell-created obstacles
* Handle damage from spell-created obstacles inside mechanics
* Experimental GameState integration/regression tests
* Ignore mod settings and load only "vcmi" mod when running tests
* fixed https://bugs.vcmi.eu/view.php?id=2765 (with tests)
* Huge improvements of BattleAI regarding spell casts
* AI can cast almost any combat spell except TELEPORT, SACRIFICE and obstacle placement spells.
* Possible fix for https://bugs.vcmi.eu/view.php?id=1811
* CStack factored out to several classes
* [Battle] Allowed RETURN_AFTER_STRIKE effect on server side to be optional
* [Battle] Allowed BattleAction have multiple destinations
* [Spells] Converted limit|immunity to target condition
* [Spells] Use partial configuration reload for backward compatibility handling
* [Tests] Started tests for CUnitState
* Partial fixes of fire shield effect
* [Battle] Do HP calculations in 64 bits
* [BattleAI] Use threading for spell cast evaluation
* [BattleAI] Made AI be able to evaluate modified turn order (on hypothetical battle state)
* Implemented https://bugs.vcmi.eu/view.php?id=2811
* plug rare freeze when hypnotized unit shots vertically
* Correctly apply ONLY_MELEE_FIGHT / ONLY_DISTANCE_FIGHT for unit damage, attack & defense
* [BattleAI] Try to not waste a cast if battle is actually won already
* Extended JsonSerializeFormat API
* fixed https://bugs.vcmi.eu/view.php?id=2847
* Any unit effect can be now chained (not only damage like Chain Lightning)
** only damage effect for now actually uses "chainFactor"
* Possible quick fix for https://bugs.vcmi.eu/view.php?id=2860
* margin option .json animation
* Use ranged attack animation for spell cast if there is no cast animation, display cast animation only on active casting.
When hero with one move point make dimension doors then he can have on
graphics full move points. Caused by substraction that make unsigned
variable < 0.
* it is possible now to add casts and shoots OTF (f.e. with spell bonus)
Centralized stack 'ammo' loading from bonus system.
* introduced small proxy class for local bonus cache
(no need to use global cache if particular selector used on node only in one place)
* handle killing resurrected creatures
* use IBonusBearer::MaxHealth() where possible
* Fixed https://bugs.vcmi.eu/view.php?id=2486
* Possible fix for 0 HP after resurrection.
* Hack-fixed https://bugs.vcmi.eu/view.php?id=2584
* Unified CStack health API
* Use CHealth for CStack count and health points
* increased SERIALIZATION_VERSION
