add getting started video 11: publishing npm packages
Merge pull request #72 from linclark/video-gs-publishing-packages

add getting started video 11: publishing npm packages
add getting started video 11: publishing npm packages
add text for gs video 11
add getting started video 12: semantic versioning
add text for gs video 12
Merge pull request #73 from linclark/video-gs-semver

add getting started video 12: semantic versioning
Update content of fixing-npm-permissions.md
revise fix npm permissions text
add .travis.yml
Merge pull request #84 from npm/travis

add .travis.yml
update npmjs.org to npmjs.com
Update requirements.md

Add info about requirement of passwordless sudo
Merge pull request #87 from evil-shrike/patch-1

Update requirements.md
update installation instructions

Fixes #59
add link to quick start video in installation instructions
add enterprise client configuration page
add/remove questions from installation instructions
Merge pull request #90 from linclark/update-installation

update installation instructions
update enterprise requirements instructions

Fixes #53

remove CentOS as a recommended system for enterprise

add quick start video link