Wraps npm v3 so you can run it alongside npm v2
Wraps the 'next' version of npm v3 as an executable
Allows you to use npm v3 alongside whatever other version of
npm you currently have installed.
npm install -g npm3
Remember to run this semi-regularly to get the latest version of npm v3.
Make sure you understand what's changing in npm v3 by reading the excellent Release Notes.
npm3 executable behaves exactly like
npm3 -v 3.2.2 npm3 install npm3 search # etc