Added item count to 'button' for usable items in inventory.

Changes format from <item name> to <item name> x<item count>
Changed how items are displayed in inventory - different format and separated by item type.

-Items names are now <item name> x<item count>. I thought this would be
nicer because if someone is looking through items they're more
interested in finding a particular item name, not a count, so displaying
the name first makes sense.

-Items are now outputted under their respective item types.
Fixed typo in Terry.js, Expected -> Expect
Merge pull request #183 from kspriv/master

Made some changes to player inventory.