v0.0.5 Proper install and cmd reference

From suggestion on Reddit two things have changed:

1. The application will now try to set itself to auto launch automatically, no need to dig around yourself. This should only work if you have not run the application prior. One way to reset that is to remove the app.vrmanifest line for this application in ~\Steam\config\appconfig.json.
2. Scripts will not be executed with cmd.exe from the system folder instead of just using the file association. This to not allow anything else to execute the scripts if the file association has been hijacked.