Barebones entity component commit events

Conflicts:
	src/GameWorld.cpp

src/System.h

@@ -24,6 +24,8 @@ public:
 	virtual void OnComponentCreated(std::string type, std::shared_ptr<Component> component) { }
 	// Called when a component is removed
 	virtual void OnComponentRemoved(std::string type, Component* component) { }
+	// Called when components are committed to an entity
+	virtual void OnEntityCommit(EntityID entity) { }
 
 protected:
 	World* m_World;