Incorrectly loading a model, Adding a VertexArray abstraction

* Using import library assimp to incorrectly load a cube.obj
* Using a temporary Renderable class as a placeholder for all data needed
to render the mesh.
* Vertex Array abstraction added

MyGraphicsEngine/shaders/fragment.shader

@@ -3,5 +3,5 @@
 out vec4 FragColor;
 
 void main(){
-	FragColor = vec4(0.0f, 1.0f, 0.0f , 1.0f);
+	FragColor = vec4(0.5f, 0.5f, 0.0f , 1.0f);
 }