Add sample pac file and release script

makerelease.sh

+#!/bin/sh -e
+
+VERSION=$1
+PREV_VERSION=$2
+
+git checkout refs/tags/release-$VERSION
+git log --pretty=fuller --date=short refs/tags/release-$PREV_VERSION..HEAD > ChangeLog
+
+./configure && \
+    make dist-bzip2 && make dist-gzip && make dist-xz || echo "error"
+make distclean

proxy.pac.sample

+function FindProxyForURL(url, host) {
+  // For SPDY proxy
+  return "HTTPS localhost:3000";
+  // For conventional HTTP proxy
+  // return "PROXY localhost:3000";
+}