userguide.pdf: Installing IBController: On Unix: chmod command affecting wider scope than required. #127

just a small fix:
in userguide.pdf there's a place:

you’ll need to make the script f iles executable, using a command similar to this:
cd /opt
chmod -R u+x *.sh

which recursively adding executable flag on all files with .sh extension. On my Mac it could affect 320 files:

sudo find /opt -name '*.sh' | wc -l
320

instead it should "change directory" 1 level deeper:

cd /opt/IBController
chmod -R u+x *.sh

Of cause same applies to "userguide.md".

thanks,
Dmitry