Not friendly to Windows users

I get to the repo to learn how to use Sphinx, but I find it really not that easy for Windows users.
1st, I shall look for the Sphinx scripts & exes(like sphinx-quickstart.exe);
2nd, I shall set the %SPHINXBUILD% env-var(no tip in the material).
And there's no tips for the new comers telling how to setup the Sphinx on Windows, though it's easy to type: 'python.exe setup.py install' under the source folder.

从源文件夹中的现有 Sphinx 设置材料和 setup.py 开始。说明 Windows 用户在哪里可以找到 Sphinx 脚本和可执行文件、如何设置 %SPHINXBUILD% 环境变量，以及如何使用 python.exe setup.py install 安装 Sphinx。完成的标准是，新手无需猜测就能按照 Windows 设置指南进行操作。