moved slides to older times

slides_2020/reveal.js/css/layout.scss

slides_2020/reveal.js/css/print/paper.scss

slides_2020/reveal.js/css/print/pdf.scss

slides_2020/reveal.js/css/reveal.scss

slides_2020/reveal.js/css/theme/README.md

slides_2020/reveal.js/css/theme/source/beige.scss

slides_2020/reveal.js/css/theme/source/black.scss

slides_2020/reveal.js/css/theme/source/blood.scss

slides_2020/reveal.js/css/theme/source/league.scss

slides_2020/reveal.js/css/theme/source/moon.scss

slides_2020/reveal.js/css/theme/source/night.scss

slides_2020/reveal.js/css/theme/source/serif.scss

slides_2020/reveal.js/css/theme/source/simple.scss

slides_2020/reveal.js/css/theme/source/sky.scss

slides_2020/reveal.js/css/theme/source/solarized.scss

slides_2020/reveal.js/css/theme/source/white.scss

slides_2020/reveal.js/css/theme/template/exposer.scss

slides_2020/reveal.js/css/theme/template/mixins.scss

slides_2020/reveal.js/css/theme/template/settings.scss

slides_2020/reveal.js/css/theme/template/theme.scss