Added Healthrelated events and start of HealthSystem, also reverted the crash "fix"

src/Game/HealthSystem.cpp

@@ -0,0 +1,38 @@
+#include "HealthSystem.h"
+
+HealthSystem::HealthSystem(EventBroker* eventBroker)
+    : PureSystem(eventBroker, "Health")
+{
+    //subscribe/listenTo playerdamage,healthpickup events with the eventbroker
+    EVENT_SUBSCRIBE_MEMBER(m_EPlayerDamage, &HealthSystem::OnPlayerDamaged);
+    EVENT_SUBSCRIBE_MEMBER(m_EPlayerHealthPickup, &HealthSystem::OnPlayerHealthPickup);
+    playerDeltaHealth = 0;
+}
+void HealthSystem::UpdateComponent(World * world, ComponentWrapper & player, double dt)
+{
+    //Health is only affected by pickup/shoot events
+    player["Health"] += playerDeltaHealth;
+    playerDeltaHealth = 0;
+    if (player["Health"] < 0) {
+        //sendout/publish death event
+        Events::PlayerDeath e;
+        e.PlayerID = player.EntityID;
+        m_EventBroker->Publish(e);
+    }
+}
+bool HealthSystem::OnPlayerDamaged(const Events::PlayerDamage& e)
+{
+    //vem skadades?
+    //antagligen spelaren själv
+    //såna här events skickas av network te spelare som kan lyssna på / kolla på de och tar hand om sina egna +-hp endast
+    //just add that damage to a variable, which will later be taken care of by UpdateComponent
+    playerDeltaHealth -= e.DamageAmount;
+    //ev skicka ut playerdeath event
+    return true;
+}
+bool HealthSystem::OnPlayerHealthPickup(const Events::PlayerHealthPickup& e)
+{
+    //vem tog upp hp?
+    playerDeltaHealth += e.HealthAmount;
+    return true;
+}