Added more chords
This was always the plan from the beginning, but it proved to be more challenging than anticipated. The way that chords were stored had to be re-structured. Previously, an array was used in each Key class that held the 7 main chords in the key. However, this proved ineffective as there are obviously more than 7 chords in a key. So, a master dictionary was created that held all the chords, and instead, that was used as a reference for all chords.