add CNAME
Merge branch 'master' of https://github.com/lirenke/lirenke.github.io
Merge branch 'master' of https://github.com/lirenke/lirenke.github.io
Merge branch 'master' of https://github.com/lirenke/lirenke.github.io
Merge branch 'master' of https://github.com/lirenke/lirenke.github.io