MAJOR
Placing Lilacs/Rose Bushes/Sunflowers/Penoys/Tall Grass/Large Ferns on top of themselves with result in the blocks now connecting like normal. You can use this to build super tall versions of themseleves or short ones.
Can now open/close doors/gates/trapdoors in buildmode without updating any blocks!
Placing Weeping/Twisting Vines now continues you plant.

MINOR
Better handling of clicking blocks while sneaking.
Using proper sounds when placing blocks.
Sounds now play in the world instead of for specifically the player.