5 In ``blog.blog``, added field ``subtitle`` which Indicates the subtitle of blogs.
7 - ``subtitle``: fields.char('Blog Subtitle')
11 In ``mail.message``, added field ``discussion`` which Indicates the unique identification
12 of paragraph on blog post.
14 - ``discussion``: fields.char('Discussion Unique Name')
22 - ``sub_title`` : contains the subtitle of every blog post.
23 - ``visits`` : Indicates the number of visits on evry blog post.
24 - ``ranking`` : Indicates the ranking on every blog post.