Implemented player tick (health/nano stamina).

* The player now heals while not in combat
* Nanos lose stamina while active, regain it while resting
* Using active nano powers drains stamina
* Standing in FM patches/lakes now deals damage
* Fixed a memory error in npcAttackPc()
* Mobs now aggro when a player gets close
* Mobs now give up the chase if the player gets out of the combat zone;
they no longer try chasing until they themselves have left it
* Added a few missing break statements in the loops in BuddyManager

Other players are not yet instantly notified of health/stamina updates,
as finding the correct way to do this has proven tricky. FM patch damage
updates other player's views just fine, though.

src/MobManager.hpp

@@ -86,6 +86,7 @@ namespace MobManager {
 
     void init();
     void step(CNServer*, time_t);
+    void playerTick(CNServer*, time_t);
 
     void deadStep(Mob*, time_t);
     void combatStep(Mob*, time_t);
@@ -96,6 +97,7 @@ namespace MobManager {
     void combatBegin(CNSocket *sock, CNPacketData *data);
     void combatEnd(CNSocket *sock, CNPacketData *data);
     void dotDamageOnOff(CNSocket *sock, CNPacketData *data);
+    void dealGooDamage(CNSocket *sock, int amount);
 
     void npcAttackPc(Mob *mob);
     int hitMob(CNSocket *sock, Mob *mob, int damage);