Added 'GO' statements to file output when targeting Ms SQL Server (Corrected)

In order to support scenarios where you have to hand off database change scripts to Dbas/Ops like I do, we need the file output to run without hand editing. I hacked together a way of adding 'GO' statements after each migration to minimize hand editing.

This is a replacement Pull Request for pull request: #492 which included changes not meant for this repo.