Attached is a draft of a glep for formalizing multiple-repository support

This is far from ideal in many ways, but i'm too tired and I drank too 
much caffine to be sane.

Also, i have no clue how to use docutils so i just tried my best.
(** is my way of doing another level of bullets, please let me know how 
to properly do this)
Comments, objections, anything consructive is welcome.

Thanks,

Andrew Muraco