Java Edition guides/Bountiful Update

This guide is a simplified overview of all the changes in the Bountiful Update (Java Edition 1.8.x releases), which assumes at least some familiarity with The Update that Changed the World (Java Edition 1.7.x releases).

Changed
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 * All mobs
 * Improved AI.
 * Now show a glow of a slightly different color when hurt.
 * Villagers || ||
 * Now have a system for distinguishing professions (colored clothes) and career
 * Farmer (Brown robe): Farmer, Fisherman, Shepherd and Fletcher / Librarian (White robe): Librarian / Priest (Purple robe): Cleric / Blacksmith (Black apron): Armorer, Weapon Smith and Tool Smith / Butcher (White apron): Butcher, Leather worker.
 * When struck by lightning, they turn into witches.
 * Have a head slot where helmets and other items can be applied.
 * Only breed when willing.
 * The first time a specific trade is done, the villager will become willing; any other time there's a 1 in 5 chance it will become willing again.
 * When a baby villager is born, both parents lose their willingness.
 * Villagers become willing to breed by consuming food: 3 bread or 12 potatoes or 12 carrots.
 * Finding out a villager's willingness in survival is achieved by counting the amount of xp given when trading:
 * Normal trading yields 3–6 experience points.
 * Changes to the farmer (profession) villager AI:
 * Harvest, collect and replant grown potato, carrot & wheat crops.
 * Craft wheat into bread.
 * Share food with other villagers.
 * Wither skeletons || Wither Skeleton Revision 1.png ||
 * Hitbox has been changed from 2.5 to 3 blocks.
 * Zombie pigmen || Zombie Pigman Revision 3.png ||
 * Adult zombie pigmen will forgive after a short time (and lose the aggression speed boost), but will continue to attack until the player escapes their aggression distance.
 * Baby zombie pigmen are now always hostile to players who have ever attacked them.
 * The only way to obtain gold nuggets and gold ingots from zombie pigmen, is now for the player to kill them, whether it's through combat, potions, or player-activated mechanisms such as manually lit TNT.
 * If killed without player intervention, zombie pigmen now only drop rotten flesh.
 * The weapon holding position of zombie pigmen has now been changed.
 * Endermen || Enderman.png ||
 * Walk slightly faster.
 * Naturally aggressive towards endermites.
 * No longer hostile to non-pearl spawned endermites.
 * Blazes || Blaze Revision 1.png ||
 * Walk slightly faster.
 * Silverfish || Silverfish.gif ||
 * Will stop occasionally before moving again (similarly to most mobs).
 * Sheep || ||
 * Drop mutton when killed.
 * Giants || Zombie Revision 1.png ||
 * Can wear armor that is properly rendered.
 * Removed AI.
 * Human || Steve.png ||
 * Removed AI.
 * Iron golems || Iron Golem Revision 1.png ||
 * No longer attack the player while in creative.
 * Attack and are by the next mobs without provocation: Zombies, skeletons, creepers, spiders, cave spiders, slimes, magma cubes and blazes.
 * Snow golems || Snow Golem Revision 1.png ||
 * Snow golems below layer 64 no longer leave a trail of snow.
 * Wolves || ||
 * Tamed and untamed wolves attack skeletons and wither skeletons without provocation, similar to how untamed wolves attack sheep in the wild.
 * Tamed ocelots & Tamed wolves || Tamed Wolf with Red Collar Revision 1.png ||
 * Tamed and untamed wolves attack skeletons and wither skeletons without provocation, similar to how untamed wolves attack sheep in the wild.
 * Skeletons & wither skeletons || ||
 * Run away from wolves instead of fighting back.
 * Spiders & cave spiders || ||
 * Can no longer draw line of sight through opaque blocks.
 * Iron golems || Iron Golem Revision 1.png ||
 * No longer attack the player while in creative.
 * Attack and are by the next mobs without provocation: Zombies, skeletons, creepers, spiders, cave spiders, slimes, magma cubes and blazes.
 * Snow golems || Snow Golem Revision 1.png ||
 * Snow golems below layer 64 no longer leave a trail of snow.
 * Wolves || ||
 * Tamed and untamed wolves attack skeletons and wither skeletons without provocation, similar to how untamed wolves attack sheep in the wild.
 * Tamed ocelots & Tamed wolves || Tamed Wolf with Red Collar Revision 1.png ||
 * Tamed and untamed wolves attack skeletons and wither skeletons without provocation, similar to how untamed wolves attack sheep in the wild.
 * Skeletons & wither skeletons || ||
 * Run away from wolves instead of fighting back.
 * Spiders & cave spiders || ||
 * Can no longer draw line of sight through opaque blocks.
 * Skeletons & wither skeletons || ||
 * Run away from wolves instead of fighting back.
 * Spiders & cave spiders || ||
 * Can no longer draw line of sight through opaque blocks.
 * Can no longer draw line of sight through opaque blocks.