Not friendly to Windows users

[hisen630]

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.