metomi/rose#49: fix save blank variable
metomi/rose#49: update
metomi/rose#49: fix crash bug
metomi/rose#49: improve presentation
Merge branch 'master' into 49.rose-edit-fix-save-blank-var
Merge pull request #662 from benfitzpatrick/49.rose-edit-fix-save-blank-var

metomi/rose#49: fix save blank variable