metomi/rose#546: initial work
metomi/rose#546: implement
metomi/rose#546: update
metomi/rose#546: adjust for new macro module naming
metomi/rose#546: refactor button menu
Merge pull request #607 from benfitzpatrick/546.metadata-macro-option

#546 - metadata macro option
Merge branch 'master' of github.com:metomi/rose into metomi-gh-pages