-git now should ignore .dub/dub.json

-added onAdd/onRemove to test
-added onAdd/onRemove callbacks for system
-generating onAdd/onRemove listeners

tests/tests.d

@@ -108,6 +108,21 @@ struct TestSystem
 		writeln("On Test System destroy.");
 	}
 
+	void onAdd(EntitiesData data)
+	{
+		writeln("Entity added ID: ",data.entites[0].id);
+	}
+
+	/*void onAdd()
+	{
+
+	}*/
+
+	void onRemove(EntitiesData data)
+	{
+		writeln("Entity destroyed ID: ",data.entites[0].id);
+	}
+
 	bool onBegin()
 	{
 		//writeln("On Test System begin.");
@@ -127,6 +142,7 @@ struct TestSystem
 	static struct EntitiesData
 	{
 		size_t length;
+		const(Entity)[] entites;
 		TestComp[] test;
 		TestComp2[] test2;
 		@readonly @optional const(TestComp3)[] test3;