Added Character Description and AtkBonus Fields. Added get() and set() methods for each class.

Methods for checking important stats in Hashmaps:
Added ABNullToZero method
Added SKillNullToZero method
Added basic fields to Item class:
Name
Type
Description
Price
MagicItem t/f
Added Description and AtkBonus columns to Characters Table initialization
Added method for queries involving a single Stat in the Characters table
Added Method for Querying characters based on a stat in the abilities table
Added Methods for Querying characters by skills and for searching for a single character.
Creted d&d database form layout
created Character query
created getCharacter method
GUI updates, can navigate through startpage, database screen, and character sheet