Correction made to Video and NWC files for Darkness on the Delta

I replaced the Video and NWC files for the song Darkness on the Delta.  The new files have been made to slow down during the second refrain similar to what we do when we perform this song.  I also inserted a pause on the last note of the last two bars of this refrain.  If you are using the NWC Files on your computer with the Noteworthy Composer Viewer, you will have to re-download this particular NWC file to bring it up to date.