Spawn monsters without prematurely exiting. Fixes BUKKIT-3425

By using return 0, we exit the loop prematurely preventing other
creature types from being spawned if one type is set to 0. By using
continue we move on to the other types and allow them to spawn
properly.
Add ItemStackMapTest

This test was missing from c056293b38cb9a1296937d91746b175252be044a
Throw BlockPlaceEvent when placing double slabs. Fixes BUKKIT-2469
Handle beds and doors the same way as other blocks. Fixes BUKKIT-3437
Relates to: BUKKIT-3438
Get the BlockState before changing the block. Fixes BUKKIT-3441
Fix entities traveling sideways. Addresses BUKKIT-3443

Original: Update mappings to correct 1.4.6 version.
Initialize entity data before spawning them. Fixes BUKKIT-3209

Vanilla does the initialize before spawning everywhere except in the
SpawnerCreature, our spawn event depends on this behavior to be
consistent.
Update CraftBukkit to Minecraft 1.4.7
Updated version to 1.4.7-R0.1 in pom.xml for Beta.
Updated version to 1.4.7-R0.2-SNAPSHOT for development towards next release.
Place beds with the correct data. Fixes BUKKIT-3447
Spigot Changes. This commit has undergone basic testing and appears to now be safe for careful production usage. Please report any bugs to IRC as soon as you encounter them. Long live Spigot!
Update Maven Shade Plugin to version 2.0. Fixes BUKKIT-3213
Address BUKKIT-3286 by firing the inventory close event when a secondary container is closed due to the player entity being destroyed. This covers all edge cases such as server stop / player kick / player quit.
Update item merge logic
Include NibbleArray from mc-dev for diff visibility
Implement 'lightening' of NibbleArrays - only allocate buffers when non-trivial value Saving from 40-45% of memory use by chunk section data.

Finish up NibbleArray lightening work - use for Snapshots, reduce copies

Fix nibble handling with NBT - arrays aren't copied by NBTByteArray
Return LOHS to full operation.
Update timeout time to new default value.
Per world view distance.