Update Bundle update

bundle_update.sh

# requires that have installed hub, https://github.com/github/hub

git checkout master && git reset --hard origin/master && git pull origin master && git checkout -b gem-update-`date +%Y-%m` && gem install bundler && bundle update && rake && git add -A && git commit -m "Bundle update `date +%Y-%m`" && git push origin gem-update-`date +%Y-%m` && hub pull-request -m "Bundle update `date +%Y-%m`"; if [[ $? = 0 ]]; then echo "SUCCESS"; else echo "FAIL"; fi;