Users running a non-download version of Vanilla (pulled from github), on branch release/2019.016 or master from the last 2 weeks should upgrade to release/2019.017 or latest master for security reasons. Downloaded official open sources releases are not affected.
Adapts DtCSS to work with Garden. DtCSS is a PHP script that preprocesses your CSS file. It speeds up CSS coding by extending the features to CSS. Such as nested selectors, color mixing and more. DtCSS reads the CSS file with special syntax written for DtCSS, and outputs the standard CSS. DtCSS project home page
Discussion about CSS helpers: http://vanillaforums.org/discussion/11287/