Merge branch 'stable' ...

# Conflicts:
#	build.gradle

Fixed possible crashes caused by wrong eventProxy.startEntity(entity) placement

Fixed player lang reset after death

[optim] Optimized vanilla leaves decay

Fixed kick on invalid url in chat

[optim] Totally replaced LongHashMap & IntHashMap implementation to Koloboke collections

Fixed invisible players after teleportation

Merge branch 'stable'

Throw IllegalArgumentException from DataWatcher if object id < 0 (fix for thaumicenergistics)

Issue #47 Command unregister, fallback prefixes

Issue #50 Permissions moved out of the core

Fixed (previous commit) on client side

Issue #14 Fixed TileEntity owner assigning on TileEntity restoring

Issue #14 added WorldUpdateObject owner inference for pending updates and block events

[optim] ImportChunkLoader disposing ...

Now we don't wait for finishing of writing all worlds. Waiting only for current world, then closing region files. Currently implemented for ImportChunkLoader only, should be implemented for default chunk loader in future

Fixed 10bec8e13a PendingBlockUpdates and EntityFallingBlock processing after chunk populating

Creating Entity UUID via ThreadLocalRandom

Revert "[optim] Entity.random replaced to ThreadLocalRandom (it's really faster)" ...

This reverts commit 3aa3ad9.
(Issues with some mods that uses random seed)

[optim] vanilla PlayerProfileCache ...

Do not rewrite json file if cache not changed, write it async

I18n for duration format & restart messages

More appropriate behavior of not splitted world mode (splitWorldDirs: false)

Exclude dead entities from of Chunk.getEntitiesWithinAABBForEntity & Chunk.getEntitiesOfTypeWithinAAAB

[optim] Entity.random replaced to ThreadLocalRandom (it's really faster)

[optim] Entity & TileEntity removal - do not call ArrayList.removeAll if no entities to remove

[optim] DataWatcher.watchedObjects type replaced from TIntObjectHashMap to fixed-size array ...

It is both CPU and memory optimization. Maximum index - 31, so array size is 32. It less than usual has table in TIntObjectHashMap

More simple chunk save predicate

[optim] Do not update EntityTracker if no players in world

Added PendingBlockUpdates and EntityFallingBlock processing and EntityItem removal after chunk populating ...

Newly populated chunk contains lots of PendingBlockUpdate and EntityFallingBlock, that takes lot of memory. PendingBlockUpdate processing causes more EntityFallingBlock spawning. In its turn, processing of EntityFallingBlock causes PendingBlockUpdate scheduling again. It solves by multiple iterations of processing both PendingBlockUpdate and EntityFallingBlock. Finally, we removing any EntityItem, that may be spawned at that time

Issue #48 CPU utilization ...

Now we calling utilizeCPU method instead of Thread.sleep in in main server loop. In this method we can do something more useful than sleep. Currently implemented SyncServerExecutor queue processing and chunk generation

World generation limited to one chunk per tick