Update StaticCache component.
Update setting stuff.
Post related updated.
Update Post,Category and Tag AR.
A lot of updates.
1. UI improve of post view page.
2. Update comments related.
Add two widgets in post view page.
Add post revision list page and revision view page.
Add a TagShow widget.
Update user related pages.
Add BuilderCommand to remember the last commit state.
Add topic support.
Implement article and topic list page in user center.
Implement user center comments page.
Add message support.
Implement user register.
UI imporve for account pages.
Implement password change and reset.
Fixed a bug of incorrect posts count.
Fixed a bug in received comments.