Prior to release, the launcher cache should be located within the launcher directory.
This will help keep our install clean and self-contained.
As a byproduct, it will also perform a one-time reset of launcher data for the public release. This is needed because previous versions changed the default directory to ./StarMade, and that behavior should be the default, especially on Steam so that Steam may manage game updates itself.
current cache directories: %AppData%/.StarMade (windows), ~/.StarMade (posix)