Install nodejs & coffee-script on Raspberry Pi 2

# curl -sL https://deb.nodesource.com/setup | sudo bash -
# sudo apt-get install -y build-essential python-dev python-rpi.gpio nodejs
# apt-get install -y build-essential python-dev python-rpi.gpio nodejs
# nodejs --version
v0.10.37
# npm --version
1.4.28

# npm install -g coffee-script
# coffee --version
CoffeeScript version 1.9.1