Added require-css-0.1.1

Source taken from: https://raw.github.com/guybedford/require-css/0.1.1/css.js

Note: In the source file it still reads version 0.0.8, but clearly the author means for this to be 0.1.1 as shown by https://github.com/guybedford/require-css/blob/0.1.1/bower.json

I did not minify this file, as there is autominification in cdnjs ??