add tips

add tips
Merge pull request #3 from zmofei/master

add tips
try to work with another one \!
delete useless files
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'master' of https://github.com/bh-lay/blog
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
fix navigation flexiable size
fix navigation flexiable size