add grenade_throw model

ToyEngine/Models/grenade_throw/license.txt

@@ -0,0 +1,11 @@
+Model Information:
+* title:	Grenade Throw
+* source:	https://sketchfab.com/3d-models/grenade-throw-52d6ac86d0d54a1bbf2f00035d570459
+* author:	JeremyFin (https://sketchfab.com/JeremyFin)
+
+Model License:
+* license type:	CC-BY-4.0 (http://creativecommons.org/licenses/by/4.0/)
+* requirements:	Author must be credited. Commercial use is allowed.
+
+If you use this 3D model in your project be sure to copy paste this credit wherever you share it:
+This work is based on "Grenade Throw" (https://sketchfab.com/3d-models/grenade-throw-52d6ac86d0d54a1bbf2f00035d570459) by JeremyFin (https://sketchfab.com/JeremyFin) licensed under CC-BY-4.0 (http://creativecommons.org/licenses/by/4.0/)

ToyEngine/src/DemoWorld.cpp

@@ -20,15 +20,20 @@ DemoWorld::DemoWorld()
 	actor3->setPosition({ -1,0,-1 });
 	auto sponza = std::make_shared<Actor>("Models\\Sponza\\Sponza.gltf");
 	sponza->setScale(glm::vec3(2));
-	auto shoot = std::make_shared<Actor>("Models\\shootgun\\scene.gltf");
+	auto shoot = std::make_shared<Actor>("Models\\shoot_gun\\scene.gltf");
 	shoot->setPosition({ 5,0,-1 });
-	shoot->setScale(glm::vec3{ 50 });
+	shoot->setScale(glm::vec3{ 45 });
+
+	auto grenade_throw = std::make_shared<Actor>("Models\\grenade_throw\\scene.gltf");
+	grenade_throw->setPosition({ -5,0,-1 });
+	grenade_throw->setScale(glm::vec3{ 45 });
 
 	addActor(actor);
 	addActor(actor2);
 	addActor(actor3);
 	addActor(sponza);
 	addActor(shoot);
+	addActor(grenade_throw);
 
 
 	float boardMass = 10;