add cleanup-latex from steven armstrong

Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>

cleanup-latex

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+DIR="${1}"
+
+[ -z "${DIR}" ] && DIR="${PWD}"
+
+DIR="${DIR%/}"
+
+if ! [ -d "${DIR}" ]; then
+	echo "cannot access ${DIR}: No such file or directory" >&2
+	exit 1
+fi
+
+rm "${DIR}"/*.{aux,nav,out,toc,snm,log}