Add new cron build script

_contrib/build_website.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+REPO='https://github.com/bitcoin/bitcoin.org.git'
+WORKDIR='/bitcoin.org'
+DESTDIR='/var/www/bitcoinorg'
+
+# Stop script in case a single command fails
+set -e
+
+export PATH=/var/lib/gems/1.8/bin/:$PATH
+
+# Clone repository if missing
+if [ ! -d $WORKDIR ]; then
+	git clone $REPO $WORKDIR
+	cd $WORKDIR
+	git reset --hard HEAD~1
+fi
+
+cd $WORKDIR
+
+# Exit if no new commit is available
+git fetch -a
+LASTLOCALCOMMIT=`git log --format="%H" | head -n1`
+LASTREMOTECOMMIT=`git log origin/master --format="%H" | head -n1`
+if [ $LASTLOCALCOMMIT == $LASTREMOTECOMMIT ]; then
+	exit
+fi
+
+# Update local branch
+git reset --hard origin/master
+git clean -x -f -d
+
+# Build website
+jekyll
+rsync --delete -a $WORKDIR/_site/ $DESTDIR/