Repository feature proposal

[seth vidal]

> Similar problems occur with other formats. Try a multibyte character one
> byte of which is '"' or '\n' in .ini format.
> 
> XML also makes the format extensible and means you already have tools to
> autogenerate it, to turn it into up2date lines, yum lines, html, or edit it.
> 

This was something I was talking about with some other folks on irc - if
there was an xml representation of a 'definition' of a
repository/channel - then you could write converters/renderers for all
the other layouts.

going from xml to any other format is pretty easy.

-sv