Notes from Dr. Gibson's class on Vending Machine

BRAINSTORMING **
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Things the program needs to have:
* Lists to store the details:
-- Multiple lists, one for name, price, quantity, etc.
   where the indexes match up (so everything at index 0
   is related: name[0], price[0], qty[0])
-- 2D list, which is a list of lists, similar to the above

Things the program needs to know:
* Position, price, etc. of each item
* What snacks are where

Things the program needs to be able to do:
* Updating the quantity
* "Loyalty program" (or jamming)
* Measure/determine coins or dollars
* Get the user choice
* Give change
* Restocking
-- Overall "fullness" of the machine as a whole
-- How to "call" the repairman
* Print/show contents of machine to user

INCREMENTAL DEVELOPMENT **
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1. Store/get data (snack name, price, etc.)
2. Be able to print data
   -- printSnacks()
----> Test at this point, make sure printSnacks() works
3. Be able to accept input
   -- getUserSelection()
----> Test at this point, make sure it only accepts valid input
4. Get money from the user
... etc.