Setup NodeJS, NPM, Gulp on OS X

###Install NodeJS Install NodeJS from their official website:

https://nodejs.org/

We are currently using 5.1.0, but the newer version should also work. The list of the older releases can be found at:

https://nodejs.org/en/download/releases/

#Install bower and gulp

mkdir -p /usr/local/lib/node_modules sudo chown whoami /usr/local/lib/node_modules

npm install -g bower npm install -g gulp