Minecraft wiki entry for Development_versions, associated text: Added a new "Husbandry" tab and several new advancements:
A Seedy Place - Plant a seed and watch it grow
Serious Dedication - Completely use up a diamond hoe, and then reevaluate your life choices
A Balanced Diet - Eat everything that is edible, even if it's not good for you
Hired Help - Summon an Iron Golem to help defend a village
Added new advancement triggers:
consume_item
placed_block
arbitrary_player_tick - only one player runs it per tick