Partialize creator
Refactor; render partial: -> render()
:put_litter_in_its_place:
Rename class .posts-reaction -> .posts-feedback
Remove unnecessary class
Fix width for posts body
Commonize style for .date
Tweak style for common h2
Add color $thin-gray
Tweak style for .circle-thumbnail-m

- Change size 80px -> 64px
Add style for .comment
Tweak line-height
Fix markup for comments
Commonize style for layout
Fix width
Fix tags design
Fix illust for footer tori atama

- 関係ないやつ入れてごめん
Merge branch 'improve_design_for_posts_show'