[pi8] Installing Cylon.js for Raspberry Pi

1. Update your raspi installation
   1. open a console window and execute
      sudo apt-get update
      sudo apt-get upgrade
2. Install last node.js and npm (node package manager)
   curl -sL https://deb.nodesource.com/setup_7.x | sudo -E bash -
   sudo apt-get install -y nodejs npm
3. Install cylon.js and cylon-raspi
   sudo npm install cylon cylon-raspi cylon-gpio cylon-i2c

More installation procedures

1. Connecting to Raspberry Pi GPIO
   1. Execute
      sudo usermod -G gpio pi
   2. needs more ??? (See Cylon-raspi NPM page)
2. Enabling the Raspberry Pi i2c on Raspbian
   sudo apt-get install i2c-tools
   1. run sudo raspi-config
      1. choose "Update"
      2. choose "Interfacing Options"/"I2C"/"enable"
3. Enabling PWM output on GPIO pins
   1. You need to install and have pi-blaster running in the raspberry-pi
4. See Cylon-raspi NPM page