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/NanoManager.hpp

@@ -66,4 +66,5 @@ namespace NanoManager {
 
     int nanoStyle(int nanoId);
     void revivePlayer(Player* plr);
+    void nanoChangeBuff(CNSocket* sock, Player* plr, int32_t cbFrom, int32_t cbTo);
 }