Why is "UVs" menu not visible? I'm following this CG Cookie tutorial.

I have a tree mesh, and loaded the image. But there is no "UVs" menu, where I could find the "unwrap" function. There is only View and Image. After them should be located the UVs
That menu shows up in Edit mode, and only when the mesh is already UV unwrapped.  

(Click on the images to get a larger view)
Object mode:
    

Edit mode, not yet unwrapped:
    

Edit mode, unwrapped:
    

To unwrap, make sure you're in Edit mode, then hit U or click Mesh > UV Unwrap and select a suitable option from the menu that shows up.