Adding network related commands to CLI
minor fixes, adding null check and text fixes
Fix jsHint errors
Improving network commands
Improve condition for storage
Apply code review
Merge pull request #1 from andrerod/network

Network improvements
Adding --dns-server-id option to vnet create command. Adding UT for this option
incorporating review comments
Merge pull request #783 from anumsopentech/network

Adding network related commands to CLI
Merge pull request #786 from WindowsAzure/network

Adding network commands