createrepo update

Hi,
 I updated the createrepo script so it fixes the bug that bill
nottingham found where I wasn't getting all the files/dirs from certain
types of rpms. And I also made it write the xml data into repodata/

it's as close to an atomic operation as I can get in python for the
move.

http://linux.duke.edu/metadata/generate/createrepo-0.3-1.noarch.rpm
if you're on fedora core or rhl9 (ish)
http://linux.duke.edu/metadata/generate/createrepo-0.3-1.src.rpm
http://linux.duke.edu/metadata/generate/createrepo-0.3.tar.gz

I still have reading the old metadata files in and only working the
changes on my todo list.

let me know if you see anything else that is not right.

Thanks
-sv