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

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

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

[refactoring] unused var & typos

Fixed chunk sorting with large view distance (> 15)

[refactoring] Var name typos

[compat] Fixed mod-supported interworld teleportation (MystCraft)

Max view distance is now 32 (15 by default)

Removed entity count from debug automessages

[compat] Compatibility with mods changes BlockLeavesBase (FastLeafDecay, DragonAPI)

[refactoring] Refactored ultramine class transformers

Configurable server directory mapping: ...

Returned vanilla logic of MinecraftServer.getFile; all vanilla files now gets by method getVanillaFile and mapped to ./storage by default. New system properties:
- org.ultramine.dirs.vanilla - sets directory for vanilla files, returns by getVanillaFile, default: storage
- org.ultramine.dirs.worlds - sets directory for worlds, default: worlds
- org.ultramine.dirs.settings - sets directory for ultramine configuration, default: settings
- org.ultramine.dirs.storage - sets directory for ultramine storage, default: storage

Fixed /memstat negative Off-heap used size & little enhancements

More correct bound chunks counting for ChunkGC

Fixed bug due to a009ef4: sometimes entities were removed from entityList, but not from chunk and tracker

[refactoring] World config applying code moved to public method in WorldServer

Issue #14 PlayerDeathEvent - allows to: ...

- set keepInventory flag
 - cancel drops processing
 - change death message

[refactoring] moved class UMEventFactory

Fixed InventoryUtil.dropItem with stackSize more than maxStackSize

Overflow-safe BasicHoldings (economy)

[refactoring] UMStripColorsRewritePolicy, ChatComponentLogMessage

Fixed some lang file typos