Issue #50 Permissions moved out of the core

Issue #49 First service architecture draft

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

Better hash for in-chunk block coords

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

Correct error-reporting on unknown WorldType and not equal generation settings in worlds.yml and level.dat

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

[refactoring] typos in class names

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

Fixed /memstat "Off-Heap chunk used" more than 2gb

Fixed JLine tab completion

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

Fixed lots of issues with /genworld command

World generation limited to one chunk per tick

[optim] ChunkSendManager enhancements: ...

- min player moved distance is now directly proportional to viewDistance
- used back sort for toSend list (to remove values from end of list without copying)
- toSend list is now sorting only before sending (if necessary)
- removed unnecessary setWorldDestroyed method

[client] Fixed sending view distance to server when closing gui video settings by esc key

[refactoring] unused var & typos