Add an optional PATH attribute to the Packages index in order to indicate the relativ...

Add an optional PATH attribute to the Packages index in order to indicate the relative path of the package within the repository.  In the future this will allow storage of more than one package per cpv but for now it's just use to indicate if a package is stored in the old-style All/ directory (instead of the category directory).

svn path=/main/trunk/; revision=6718