add Pandoc to create PDF cheat sheet

vars.yml

@@ -0,0 +1,26 @@
+---
+# metadata
+title: Neovim cheat sheet
+author: Oliver Ladner
+lang: en
+keywords:
+  - neovim
+  - cheat sheet
+
+linkcolor: blue
+
+documentclass: scrartcl
+pagestyle: empty
+papersize: a4paper
+geometry:
+  - a4paper
+  - left=0.5cm
+  - right=0.5cm
+  - top=0.7cm
+  - bottom=0.5cm
+  - landscape
+
+columns: 4
+fontsize: 12pt
+ragged: yes
+graphics: yes