Comment 24 for bug 645300

Mirrors already have thousands of small files. Look at the size of most rpms.
If push came to shove we could:
1. generate sets of app/icon metadata for each package
2. generate sets of app/icon metadata for each package of each group from comps (so you get all the apps from that group at once)
3. Do both.

We're talking about 80-150MB in roughly 2000 files, iirc. The mirrors can soak that up. And having an index file you grab from the repodata is just like things we already have.