Updated HOL.md and images
Removed extra image. Added missing anchor on Ex3Task1 title
Renamed images folder
Improved lab, added several missing steps. Fixed typos, grammar errors.
Removed extra images
Fixed lab due to latest vm username changes in the portal
Update screenshots that showed preview features
Fixed typos, missing steps and comments
Merge pull request #2 from WindowsAzure-Preview/master

Updated to IaaS Global Availability