Add command line arguments to allow setting app.config settings.

[Swimburger]

If the "TargetUri", "APIKey", and "EncryptionKey" could be set via command line arguments, or environment variables. The executable file could be more portable and not rely on the app.config.
For CI/CD systems, this would make setting up a Module deploy task easier

[bdukes]

This is already in place. If you run DeployClient.exe --help, it will show your the available arguments (--api-key, --encryption-key, --target-uri are the big three)

[Swimburger]

I see it in the development branch, that will be a great addition. Thanks!

[Deleted user]

Addressed by #10.