Complete changelog:

• Customizable world borders
  • “No more bedrock barriers or sudden edges of the world into the void”
  • Shimmery!
  • There’ll be a pretty barrier at the edge of the world
  • Edge of the world is customizable
  • Screenshot , animation 
  • Fades out based on distance
  • /worldborder
• More world customization options
  • Screenshots: 1 , 2, 3, 4 , 5
  • Video 
  • Maybe: Cleaned up the menu
  • Four pages of generator options: Two containing the same options, one of them with sliders, the other with text fields
  • First two pages: Main Noise Scale X/Y/Z to smooth out terrain, larger values for smoother terrain; Biome scale/depth weight and Biome scale/depth offset to stretch/squash terrain vertically based on the biomes default height settings; Upper/lower limit scale to make terrain more solid/riddled with holes, depending on how close the values are to each other; Height Stretch to pull terrain upward, with smaller values causing more extreme stretching; Height scale, coordiange scale, depth base size, depth noise exponent, depth noise scale X/Z for magic
  • Third page: Ore distribution options for Dirt, Gravel, Granite, Diorite, Andesite, Coal, Iron, Gold, Redstone, Diamond and Lapis: Rarity, height range and vein size
  • Fourth page: Sea level height, toggles for cave, village, temple, dungeon, water lake, lava lake, stronghold, mineshaft and ravine generation, sliders to control water lake, lava lake and dungeon rarity, toggle to turn oceans into lava oceans, biome selection, biome and river size sliders
  • A button to randomize the various values
  • A few presets such as floating islands or a flooded world
  • Uses the ‘generator-settings’ string known from superflat presets for server.properties and world data
• Maybe: Sheep now show their color even when shorn
• Reverted the minecart changes
• The server list can now be reordered like resource packs
  • Screenshot 
  • Use ‘up’/’down’ to reorder, ‘right’ to join
• Converted the remaining blocks to use BlockStates
  • Screenshot 
  • Improves performance
  • Some block id/metadata combinations might be broken by this, though all-sided logs will be kept
  • List of block states
• Endermite changes, possibly involving the dragon egg
  • New model
• Model format improvements
  • Removed the directional attribute from the uv definition and replaced it with explicit texture references
  • Textures can now be specified
  • Converted the remaining static blocks to the model format
  • Now instead of supplying a “textureFacing” parameter, you simply specify a “texture” parameter, which can be either direct or hierarchical – if so, it is prepended with the hash symbol (#), otherwise it’s just the texture name
  • “useAmbientOcclusion” renamed to “ambientocclusion”
  • “textureFacing” deprecated
  • “cull” renamed to “cullface”, specifies the opposite of which neighboring face causes culling to occur – Example: if you have an east-facing face but want it to be culled along a different axis (let’s say Z), you would specify “cullface”: “north” or “cullface”: “south”.
  • Rotation made more verbose, it is now more clear that it can only occur on a single axis – Example, the rotation for one of the two faces of the “cross” model is now: “rotation”: { “origin”: [ 8, 8, 8 ], “axis”: “y”, “angle”: 45, “rescale”: true },
  • New flag, “rescale”, added to the rotation parameters – when true, face will be scaled across the whole block
  • “UV lock” to preserve uv details through rotation
  • Examples: 1, 2, 3, 4, 5
  • More details
• Fixed some bugs
  • Fixed chunks rendering in the wrong order
  • Fixed stuck Arrows, when landing a second time, behaving as if they had landed in the block at the coordinates they were initially stuck on, allowing for destruction of Bedrock, duplication of TNT and changing of data values
  • Fixed /save-all causing lag spikes on larger maps
  • Fixed the ‘report to Mojang’ button in the Broadcast settings linking to the old bug tracker
  • Fixed the “replace” directive in sounds.json not working
  • Fixed right-clicking filled cauldrons with undyed leather armor still using up water
  • Fixed animals being obsessed about their parents even after growing up
  • Fixed the second arm being displayed when holding maps using the wrong textures
  • Fixed mobs lighting up when hit
  • Fixed east/west pillars having shading errors
  • Fixed being unable to place heads in multiplayer
  • Fixed almost instant motion sickness due to distorted rendering, FoV can now be turned down to 30
  • Fixed the scrolling in lists