Just change permission
Add answer notification to Survey
Just change permission
Modify rss/atom links
Add open period to Survey::Form
Add filename setting to feed piece
Hide survey form if it's not opened
Merge branch 'rss' of https://github.com/kanety/zomeki-development into kanety-rss
Fix validation
Just change permission
Add body histories to GpArticle::Doc
Merge branch 'master' of https://github.com/zomeki/zomeki-development