Update to 4.3.0

• Change npm installation [1]

Starting with this update, npm will be built, installed and archived on my own
box to speed up the installation. The installation on target machines will be
simply extraction and copy.

Changes: https://github.com/npm/npm/releases

		https://github.com/npm/npm/blob/v4.3.0/CHANGELOG.md

Suggested by: adamw [1]