Add setup script for Node 4.x repo.
Add setup script for Node 4.x repo.

0xmohit/distributions,nodesource/distributions,LZYlove/distributions,yangchengwork/distributions,nodesource/distributions,virtru/distributions,virtru/distributions,3Dn/distributions,LZYlove/distributions,3Dn/distributions,0xmohit/distributions,yangchengwork/distributions