Added how to install from npm
Added how to install from npm
beenanner/sitespeed.io,JeroenVdb/sitespeed.io,JeroenVdb/sitespeed.io,sitespeedio/sitespeed.io,sitespeedio/sitespeed.io,sitespeedio/sitespeed.io,sitespeedio/sitespeed.io,JeroenVdb/sitespeed.io,beenanner/sitespeed.io,beenanner/sitespeed.io