Always produce unlinked output and copy files by default
Always produce unlinked output and copy files by default

Because of `?debug=true` digging into separate files we always
have to include intermediate files in the output build. This means
we also always have an output directory so copying non-code files
by default should be safe. Always keeping intermediate files has
some benefits, such as there being fewer transformation steps
involved meaning debugging information may be of higher quality.

zambezi/ez-build,zambezi/ez-build