- shared_ptr for destructibleEnemyTurns instead of raw pointer
- drop implicit int conversion for BattleHex class
and implement toInt() instead
- implement necessary operators in BattleHex
- adjust code to work properly with JSON serializer
- Moved short, frequently used functions to the BattleHex header for inlining
- Made BattleHex a class with a private hex value
- Moved getClosestTile implementation back to BattleHex
- Enabled access to static precomputed data in BattleHexArray via BattleHex
(note: circular dependency prevented static precomputed containers being directly placed in BattleHex)