[emacs] Add snippets for latex mode.

.emacs.d/snippets/latex-mode/doc.yasnippet

@@ -0,0 +1,10 @@
+# -*- mode: snippet -*-
+# contributor: Mads D. Kristensen <madsdk@gmail.com>
+# key: doc
+# name: \documentclass
+# --
+\documentclass[$2]{${1:$$(yas/choose-value '("article" "report" "book" "letter"))}}
+
+\begin{document}
+$0
+\end{document}