Upgrade Periodic 6.0.0 to node 4.2.4

Notes:

$ curl -sL https://deb.nodesource.com/setup_4.x | sudo -E bash -
$ sudo apt-get install -y nodejs
$ sudo apt-get install -y build-essential
$ cd /var/www/periodic-5-baseline/source/node_modules/periodicjs/
$ sudo rm -rf node_modules/
$ sudo rm -rf content/themes/periodicjs.theme.default/node_modules/
$ npm i
$ npm run deploysync