Added auctex and yasnippets

.emacs.d/snippets/latex-mode/default

@@ -0,0 +1,12 @@
+# -*- mode: snippet -*-
+# name: default
+# key: defa
+# --
+\documentclass[12pt]{article}
+
+\usepackage{titling}
+\usepackage[a4paper, left=2.5cm, right=2cm, top=2cm, bottom=2cm]{geometry}
+
+\begin{docuemnt}
+$0
+\end{document}