added publish flag and manualy edit of created date by admin
fix tests and added default value for created field of post
Merge remote-tracking branch 'remotes/upstream/master' into 13829_fix_published_date_and_published
move protected method in bottom and added doc
Merge pull request #116 from lensky84/13829_fix_published_date_and_published

added publish flag and manualy edit of created date by admin