UV mapping - Unwrap greyed out I'm using Blender 2.71.

After adding armatures to my model I cannot unwrap or show a uv map. I've done it before on a different model and with the same one. But now I cannot unwrap it at all and the texture won't even show. When selecting all in edit mode the option to unwrap is greyed out.

I was following this tutorial to add armatures if this helps: https://www.youtube.com/watch?v=PPbSGUPj72w
This is because you have no faces.

To add faces, select everything with A and press F: