Since there is no demo or us site anymore we can simplify the structure
somewhat by moving the sandbox one directory up

This is pretty much what I use for bikepartsmarket.com. If this gets
some more eyeballs, it might mature enough to move into Oscar core.

Just crossing items off my bucket list.

It's a nice app to handle non-blocking email sending.

Those documents lived in ref/, but really aren't reference documents.
Topics/ is a more appropriate place for them.