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 -v3.2.2> npm3 install> npm3 search# etc