Move, update, and convert HTML/CSS Style Guide from XML to HTML. (google#232)

Author: tonyruscoe

README.md

@@ -37,7 +37,7 @@ for more details.
 [py]: https://google.github.io/styleguide/pyguide.html
 [r]: https://google.github.io/styleguide/Rguide.xml
 [sh]: https://google.github.io/styleguide/shell.xml
-[htmlcss]: https://google.github.io/styleguide/htmlcssguide.xml
+[htmlcss]: https://google.github.io/styleguide/htmlcssguide.html
 [js]: https://google.github.io/styleguide/jsguide.html
 [angular]: https://google.github.io/styleguide/angularjs-google-style.html
 [cl]: https://google.github.io/styleguide/lispguide.xml