download directory

[Rahul Sundaram]

Hi

I would like to propose a couple of changes to the way download 
directories are organised currently

* Move boot.iso image to ISO folder. Many users do not look into 
os/images and are unaware that a net installation method exists.
* Move Source ISO images into a different directory. Mirrors can choose 
not to copy them. Many new users  end up downloading this instead of the 
binary ISO images

regards
Rahul