Follow steps from http://coding.memory-forest.com/%E5%A6%82%E4%BD%95%E7%94%A8git-%E5%B0%87%E5%8E%9F%E5%A7%8B%E7%A2%BC%E4%B8%8A%E5%82%B3%E8%87%B3-github.html