Fix licence headers

Julien LepillerSun Jun 27 16:47:46+0200 2021

69f8406

gitile/assets/css
namelast commitdate
gitile.cssAdjust markdown renderingSun Jun 20 23:50:01+0200 2021
highlight.cssSupport gitignore highlightingSun Jun 27 00:46:55+0200 2021