Store it at the static folder, like before.
I created a new config field for that originally, but then I understood that it is to be thrown away anyway when the Structure comes, so decided to keep it the old way.
assets.qtpl is no more! Now you can just add files to static/ folder,
make sure the extension is registered in static.go (a shortcoming
that'll be addressed in future Go versions), and you're done! It
searches the local file system first, then falls back to the files
embedded with the binary (in the static/ folder).