You can smooth the normals in the Unity model importer by changing normals on "Calculate" and do a higher normal smoothing angle.
And for cubemaps, now in Unity 5 you have to setup them in the Lighting window, it will be added automatically to all the Standard shaders.
And for cubemaps, now in Unity 5 you have to setup them in the Lighting window, it will be added automatically to all the Standard shaders.