metomi/rose#503: split configuration reference page
metomi/rose#503: tidy
metomi/rose#503: document
metomi/rose#503: tidy
metomi/rose#503: fix tidy
metomi/rose#503: retidy
metomi/rose#503: fixes and reference
metomi/rose#503: update following feedback
metomi/rose#503: tidy
metomi/rose#503: tidying
metomi/rose#503: update
Merge pull request #720 from benfitzpatrick/rose-metadata.fail-if-spec

#503: rose metadata fail if spec