adjust node.js web.config template for S21
site deploymentscript --node will not generate web.config.
Fix tests for not generating web.config on azure site deploymentscript --node
Change missed build args
Add default value to script type which is based on os
Fixes #142
Add argument for the output path to generate the script on.
Fixes #521
Update error description with correct argument name
Fix spacing issues
Merge pull request #537 from amitapl/dev

Update site deploymentscript feature with latest Azure Websites S21