added a function that adds a /Users/shelbyjsturgis/bin directory to the /Users/shelbyjsturgis/.pythonbrew/bin:/Users/shelbyjsturgis/.pythonbrew/bin:/Users/shelbyjsturgis/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin:/usr/local/sbin/:/usr/local/share/python