Mob spawning rules

[belathus]

• [x] Baby Spider - \<primitivemobs:baby_spider> Spawns with mother spider. No changes suggested.
• [x] Bewitched Tome - \<primitivemobs:bewitched_tome> Only spawns in spooky biomes. Cannot spawn in the Nether or the End.
• [x] Blazing Juggernaut - \<primitivemobs:blazing_juggernaut> Spawns in the Nether. No changes suggested.
• [x] Brain Slime - \<primitivemobs:brain_slime> Spawns on beaches. No changes suggested.
• [x] Dodo - \<primitivemobs:dodo> Spawns on mycelium. No changes suggested.
• [x] Festive Creeper - \<primitivemobs:?> Throws TNT. Currently disabled, but can have its block damage disabled. Consider doing so, and re-enabling the festive creeper.
• [x] Filch Lizard - \<primitivemobs:filch_lizard> Spawns in deserts. Perhaps add to the type of gems that it can spawn with.
• [x] Grove Sprite - \<primitivemobs:grovesprite> Spawns in forests, usually attached to a tree (taking on the colors of that tree and carrying its respective sapling). Grove sprites are docile.
• [x] Haunted Tool - \<primitivemobs:haunted_tool> Spawns in spooky biomes (which includes the roofed forest, ominious woods, and dead swamp). Drops the tool it appears as. We should altar the list of tools that can be haunted tools.
• [x] Lily Lurker - \<primitivemobs:lily_lurker> Spawns in swamps. No changes suggested.
• [x] Lost Miner - \<primitivemobs:lost_miner> Spawns underground. No changes suggested.
• [x] Mimic - \<primitivemobs:mimic> Spawns in caves underground. Consider adjusting the loot tables associated with the mimic. Mimic spawners might be a little broken, as the mimic orb can turn empty chests into treasure chests.
• [x] Mother Spider - \<primitivemobs:mother_spider> Spawns anywhere. No changes suggested.
• [x] Rocket Creeper - \<primitivemobs:?> Launches itself into the air when close to a player and explodes when it lands. Frustrating to deal with when the player doesn't have a ranged weapon, so I've disabled it.
• [x] Skeleton Warrior - \<primitivemobs:skeleton_warrior> Spawns anywhere. No changes suggested.
• [x] Support Creeper - \<primitivemobs:support_creeper> Normally docile, but enhances other mobs (especially creepers). Spawns anywhere. No changes suggested.
• [x] Traveling Merchant - \<primitivemobs:traveling_merchant> Spawns on natural blocks in bright areas. Can be prevented from despawning by giving it a block of emerald. No changes suggested.
• [x] Treasure Slime - \<primitivemobs:treasure_slime> Spawns anywhere. Has loot. We probably should change the loot table to spawn other items.
• [x] Trollager - \<primitivemobs:trollager> Spawns anywhere. Drops obsidian, emeralds, stone, and golden apples. Damages terrain. We probably should turn off its ability to damage terrain, since it currently causes crashes and will destroy the walls of your base, since it can detect a player's presence from a good ways away like a zombie and will tunnel through walls when it does so.