Merge pull request #982 from ogail/dev

Fix compilation error
Add scenario tests
Add .NET 3.5 as a dependency
Merge pull request #992 from ogail/989

Add .NET 3.5 as a dependency
Fix scenario tests failure
Fix invalid credentials test
Fix init tag
Fix MSI
Remove Startup.ps1 from MSI
Remove Startup.ps1
Merge pull request #988 from ogail/scenario

Add scenario tests
Refactor the welcome message
Merge pull request #994 from ogail/987

Remove 3.5 dependency and Startup.ps1
Merge branches 'dev' and 'release' of https://github.com/WindowsAzure/azure-sdk-tools into dev