Force And Animus Items, Force Casting, Walk Height, Store Prices

Features

• GOMMO-001: Force and animus items. In RF Online, use_item learns a force item and registers an animus, and learn_force and pet_register do the same by name; a registered animus appears in pets and pet_summon calls it. Reported by NeedCoffee.
• GOMMO-001: Store prices. The store list carries each item's price. Reported by NeedCoffee.

Improvements

• GOMMO-001: Item use. inventory and observe say how each item is used. Reported by NeedCoffee.
• RF 4.15 and 4.55 money. Trade offers and currency exchange work against current RF 4.15 and RF 4.55 servers.

Fixes

• GOMMO-001: Walk height. walk_to left characters at height 0 or floating; it takes an optional height and otherwise keeps the character's own. Reported by NeedCoffee.
• GOMMO-002: Force casting. Casting a force by name or id could cast a different one, such as Focus for Radiant Fall; each force is cast as itself. Reported by jonahmal.