Check for SaveGameFolder before starting an instance

[Alloc]

So the saves go to the proper path.
Is there a way to get the relative path from $SDTD_ROOT to $SDTD_BASE automatically?

[Alloc]

See ​Winepath and ​http://stackoverflow.com/questions/2564634/bash-convert-absolute-path-into-relative-path-given-a-current-directory. Should not be required if there's a native server though.

[Alloc]

Should no longer be required as the instance management automatically sets the correct path.