Fixed newImage.sh and copyImage.sh scripts. Removed automatic Cog downlo...

Not sure if you want this, but the scripts in bin didn't work for me on Mac or Linux.  I've updated them and commented out the automatic Cog download dependency.

running './bin/newImage.sh test' from within the Cuis directory now sets up a subdir called test with renamed copies of the image/changes/sources files.  Tested on Mac and Linux.