-support for system priority

-fixed callers system pointer update
-fixed HashMap issue

tests/tests.d

@@ -101,6 +101,28 @@ int main()
 			test2.b += 2;
 			test2.a = 8;
 			//writeln("Jakis tekst! ",test2.b);
+			writeln("Low priority tekst! ");
+		}
+
+		void handleEvent(Event event, ref TestComp comp)
+		{
+
+		}
+	}
+
+	struct TestSystemWithHighPriority
+	{
+
+		void initialize(ref Entity entity, ref TestComp comp)
+		{
+
+		}
+
+		void update(ref Entity entity, ref TestComp test) //ref TestComp comp)
+		{
+			assert(cast(size_t)&test % TestComp.alignof == 0);
+
+			writeln("High priority tekst! ");
 		}
 
 		void handleEvent(Event event, ref TestComp comp)
@@ -158,7 +180,9 @@ int main()
 
 	time = MonoTime.currTime;
 
+	gEM.registerSystem!TestSystemWithHighPriority(100);
 	gEM.registerSystem!TestSystem(0);
+	//gEM.registerSystem!TestSystemWithHighPriority(100);
 	//gEM.registerSystem!TestSystem2(0);
 
 	dur = (MonoTime.currTime - time).total!"usecs";