Create post-header.html
Rename files and tags.
Move script code to include files.
Modify title.
Escape special characters in tags for URI.
Move post title to layout page.
Add old posts.
Do not show tag line when no any tag.
Add old pages.
Add old posts and comments.
Add old posts (without content).
Add nevigator of posts.
Add TOC.
Add precise time of old posts.
Change time format and add place.
Add RSS support.
Split post list by public date.
Change font-family.
Save comments of old posts in meta-data.
Correct typo.