Some additional Properties

- FIX: Items.Mounts is Dictionary<String,Bool> not <String,Int>

- Change: Items.Gear (was .gear)
- Change: IHabitRPGClient.GetUserAsync() was .GetUser

- ADD: Items.HatchingPotions | CurrentMount
- ADD: Preferences.Costume | Sleep | Background

- ADD: GetMemberAsync ("/members/{uid}")
- ADD: HabitRpgConfiguration.SerializerSettings