Copy *all* assets files

[markjaquith]

Currently the hook to copy the assets folder into public will ignore files without an extension. This is confusing, and many "meta" files that you do want copied to public are silently excluded by this.

This change removes that restriction.

Here is the meat of the change: c23be2771861bb2a305825b35590da04cba8d5be

I couldn't figure out how to make VS Code not trim trailing spaces, so I did that as a separate commit.