Pixelmon Ranger Gigaremos

Minor update fixing various NPC issues I've found while working on the builds for the world generation implementation.

• Skins are correctly mapped to Steve/Alex models.
• Most Ranger NPCs now wander around correctly (except Quartermasters).
• The combat capable Ranger NPCs have been given an interaction split so that talking to them only initiates conversation, and you need to throw a ball at them to trigger a battle.
• Ranger Mechanics have had all their shop logic removed and been given new dialogue.
• I've added 3 DimSun grunts the wander around and have new dialogue.

Unfortunately nothing I did was successful in evading the Pixelmon NPC bugs where they lose their pathfinding when a world is relogged after they have spawned in, or the behaviour that causes NPCs to stop moving at night (unless there is an unoccupied bug nearby). I don't believe anything I tried to resolve those issues was left in this version, so when Pixelmon fixes those bugs the NPCs in this mod should also be fixed.