aggregate: Improve display of post author.

The recent move of the post author to the author field is good, but with
it coming after the name of the feed, it is unlikely to be visible when
viewed in eg mutt. Move it to before the feed name.
Merge branch 'master' of ssh://git.ikiwiki.info
Merge branch 'master' of ssh://git.ikiwiki.info
Merge branch 'master' of ssh://git.ikiwiki.info
Merge branch 'master' of ssh://git.ikiwiki.info
Merge branch 'master' of ssh://git.ikiwiki.info
Merge branch 'master' of ssh://git.ikiwiki.info
Merge branch 'master' of ssh://git.ikiwiki.info
Add my git repository
Remove link to github commit, and reference a branch instead
Merge branch 'master' of ssh://git.ikiwiki.info
Merge branch 'master' of ssh://git.ikiwiki.info
Add a patch for the osm plugin
Merge branch 'master' of ssh://git.ikiwiki.info
Merge branch 'master' of ssh://git.ikiwiki.info
Add patch
patch looks good.