想在Github上开一个免费的博客，Github上开博客需要用到GitHub Pages. 虽然中文的说明很多，但是英文的说明也很简介，不难读懂，大家可以直接去GitHub Pages上看下介绍，图文并茂，详细的操作都有截屏。
第一步是创建一个特殊名字的代码仓库，这个名字怎么起呢？
Create a repository
Head over to GitHub and create a new repository named username.github.io, where username is your username (or organization name) on GitHub. If the first part of the repository doesn’t exactly match your username, it won’t work, so make sure to get it right.
