Bugfixes + Damage Formula Adjustment

* Entering/exiting groups should apply/remove group buffs.
* Fixed issues with nanos losing all stamina from various revives/warp away.
* Heavily tweaked damage formula, nano types now boost/decrease damage.
* Weapons can consume battery returning extra damage, battery consumed depends on enemy level.

src/Player.hpp

@@ -64,4 +64,5 @@ struct Player {
     int32_t iIDGroup;
     int groupCnt;
     int32_t groupIDs[4];
+    int32_t iGroupConditionBitFlag;
 };