change about me.
write a blog about css principle.
remove annyang, because it need https, but github do not support https.
optimize post about css principle.
optimize stylus for css.
go on css principle.
write a part about DRYCSS for css principle.
add more sign in posts css principle.
change title to more high level.
complete post that css principle.
remove html code for markdown.
rename post for css principle.