adding cash-register.js and shopping-cart.js
edited total function to return the total instead of printing to console
adding appointment.js (basic and intermediate)
adjustment of shopping cart.js so i'm not editing the array inside of a forEach. David says that is a no-no.
Merge pull request #2 from portlandcodeschool/skgolden

Great job on this assignment Sandra. Let me know if you have any questions about the advanced part of the wednesday assignment. I'm going to go ahead and merge your pull request. Feel free to do another pull request should you decide to do the advanced assignment.