Various bugfixes and adjustments

* Nano missions should now stop repeating.
* Bitwise operators are now used to handle buff/debuff bitfields.
* Changing nano powers will no longer grant you infinite buffs.
* Mobs now heal up client-side after retreating, this comes with candy effect being played however.
* Lower level mobs now hit harder.
* Nanos drain stamina quicker when they grant passive powers.
* Healing, damage and leech powers scale up with your level.
* Player on player damage now accounts for damage and armor.

src/MissionManager.cpp

@@ -167,11 +167,8 @@ bool MissionManager::endTask(CNSocket *sock, int32_t taskNum) {
         saveMission(plr, (int)(task["m_iHMissionID"])-1);
 
         // if it's a nano mission, reward the nano.
-        if (task["m_iSTNanoID"] != 0) {
+        if (task["m_iSTNanoID"] != 0)
             NanoManager::addNano(sock, task["m_iSTNanoID"], 0, true);
-            // check if the player already has enough fm for the next mission
-            updateFusionMatter(sock, 0);
-        }
 
         // remove current mission
         plr->CurrentMissionID = 0;