Fixed bug where IFS shell var would get set to empty string

I have tested the old version and seen the problem, then tried with this new version, and the problem is gone.

IFS info: http://stackoverflow.com/questions/16719770/what-can-change-command-substitution-behavior-in-bash and http://www.gnu.org/software/bash/manual/html_node/Word-Splitting.html

The bug was that after source-ing the setup.bash my IFS shell var would be set to the empty string, which means it does NO word splitting.  The original behavior is when IFS is UNSET which means split on any white space.