Updates:
 - Added bevel to the entry that is supposed to represent what the user
is searching for clarity
 - removed search button, search results now update every keystroke.
 - add button will now add the word in the text field to the user list
(and master list) if it is not present
 - the return key will also use the add button functionality and
highlight the text
 - remove button will now remove the word in the text field from the
user list

The program is now in full working order, enter the item you want to
check and the results will show up immediately whether or not you
already have it, add it using the return key or the add button.

Todo:

 - Fix capitalization in masterIndex.txt file.
 - Convert display from an ArrayList of JLabels to a JList and allow
item attributes to be edited from the main window
 - Add item information to main window