Add a snippet for the Metropolis template

vim/.vim/UltiSnips/markdown.snippets

@@ -20,3 +20,37 @@ logo: /home/coolneng/Pictures/Logos/UGR.png
 ...
 
 endsnippet
+
+snippet	slides "YAML metadata for the Metropolis template"
+---
+title: "$1"
+author: [Amin Kasrou Aouam]
+date: "`date +%F`"
+header-includes:
+
+- \definecolor{dkgreen}{rgb}{0,0.52,0}
+- \definecolor{gray}{rgb}{0.5,0.5,0.5}
+- \definecolor{mauve}{rgb}{0.4,0,0.7}
+- \definecolor{customBlue}{rgb}{0.1,0.1,0.65}
+- \definecolor{customOrange}{rgb}{0.88,0.53,0.13}
+- \lstset{frame=tb}
+- \lstset{language=c}
+- \lstset{aboveskip=5mm}
+- \lstset{belowskip=5mm}
+- \lstset{showstringspaces=false}
+- \lstset{columns=flexible}
+- \lstset{basicstyle={\scriptsize\ttfamily}}
+- \lstset{numbers=left}
+- \lstset{numberstyle=\tiny}
+- \lstset{stepnumber=1}
+- \lstset{numbersep=8pt}
+- \lstset{numberstyle=\tiny\color{gray}}
+- \lstset{keywordstyle=\color{customBlue}}
+- \lstset{commentstyle=\color{dkgreen}}
+- \lstset{stringstyle=\color{mauve}}
+- \lstset{breaklines=true}
+- \lstset{breakatwhitespace=true}
+- \lstset{tabsize=4}
+...
+
+endsnippet