Don't use absolute paths in generated livestream scripts

[DaniruKun]

Currently the setup script generates a script that has absolute paths: https://github.com/cyberofficial/Synthalingua/blob/master/setup.bat#L48

This breaks when the user moves the whole project to e.g. a different directory or drive. It should use relative paths imho.

[cyberofficial]

Changed 👍