Added vulcanize under third_party/npm_modules

node_modules/vulcanize/util/changelogs.sh

+#!/bin/bash
+#
+# @license
+# Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+# This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+# The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+# The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+# Code distributed by Google as part of the polymer project is also
+# subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+#
+
+# tags sorted semver style
+TAGS=($(git tag -l | sort -k1,1r -k2,2r -k3,3r -t.))
+
+TO=(${TAGS[@]})
+
+FROM=(${TAGS[@]:1})
+FROM+=(`git rev-list --max-parents=0 HEAD`)
+
+for i in ${!FROM[@]}; do
+  echo "### ${TO[$i]}"
+  git log ${FROM[$i]}..${TO[$i]} --pretty="- %s"
+done