Forward argv to app

[liangchunn]

When starting a CLI app with typescript-node-scripts start --cli=true, the --cli=true argument isn't being passed to the app.

We should probably have some kind of separator for TNS's own CLI args and also app specific args. Something like

typescript-node-scripts start --no-collapse -- --cli=true

should be used instead, where anything before -- is used as argv for TNS and anything after is forwarded to the application itself.

[liangchunn]

Closed in f26d370