removed .editButton

removed .editButton because of this had to remove editRevert but can now
trigger on blur properly and no longer need to use globals.js since all
globals have been removed
improved #addText focus

now focus() on #addText when document is ready and select #addText after
each addItem
.addItem transition

added a transition to toggle an opacity class on adding and deleting
items from the shopping list
refactor toggle to add and remove

refactored toggleClass to addClass and removeClass to increase
readability
Merge pull request #1 from drabinowitz/noEditButton

No edit button