Update Welcome Docs
Update Welcome Docs

NPM released a new version which no longer work with the version
of Node we install in the docs. By updating NPM and Node they
play nicely with each other and no longer need the symlink.

Tested on a clean VM using:
  Distributor ID: Ubuntu
  Description:    Ubuntu 14.04.5 LTS
  Release:        14.04
  Codename:       trusty

Change-Id: Ie4a2cce194944ea57b542b01d072dfff8a8b40b3

indiereign/shaka-player,indiereign/shaka-player,TheModMaker/shaka-player,vimond/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,TheModMaker/shaka-player,vimond/shaka-player,TheModMaker/shaka-player,TheModMaker/shaka-player,tvoli/shaka-player,indiereign/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,vimond/shaka-player,shaka-project/shaka-player,tvoli/shaka-player