Update changelog and package.json
Update changelog
Fix for issue #518
Merge pull request #519 from markcowl/release-0.6.16

Fix for issue #518
Merge pull request #509 from WindowsAzure/release-0.6.16

Release 0.6.16
Merge pull request #524 from WindowsAzure/master

Merge back to dev
Add environment option
529: portal command environment
Merge pull request #531 from andrerod/dev

Multiple fixes