Adds items to Hero class

Adds Item objects along with get and set methods for each of the five equipment slots.
Adds more members and get and set methods to Item

Adds the remaining initial members to the Item class as well as get and set methods for each.
Adds loadItem method to ItemHelper

Adds a method to load an Item from the database into a Item object.
Adds equipment slot item loading to the hero loading method.

Adds code to the loadHero method that will look up which items the hero has equipped and load the items' data into the hero's member Item objects.
Adds equipped items to the interface data

Loads the names of the hero's equipped items and displays them in the HeroTracker interface.