Realistic Vanilla Horses

Adds several more horse colours + patterns that are both more realistic (no more black mould or uniform white spots) and vanilla friendly (all are based on the vanilla texture).

Colours

- Black - Brown - Dark Bay - Cherry Bay - Liver Chestnut (+ flaxen mane/tail) - Sorrel (+ flaxen mane/tail) - Palomino - Buckskin - Dark Gray - Steel Gray - Gray - Cremello ("White")

Patterns

- Face Markings (Star, Snip, Blaze, Stripe) - Leg Markings (Socks, Stockings) - Combinations of Face and Leg markings (e.g. Star with Socks) - Dapples - Roan - Dorsal Stripe - Paint (5 options including Overo, Tobiano and Splash) - Appaloosa (Leopard, Blanket, Spotted Blanket and Snowflake)

To-Do

- More paint/appaloosa options so it is less likely that 2 horses look the same - Adjust rarities of each type of colour/marking to be more realistic