Merge branch 'stable'

Issue #51 new off-heap chunk storage ...

- service-based implementation
  - allocate memory on request an delayed release on chunk unload
  - added experimental optional minecraft 1.8 chunk memory layout
      (-Dorg.ultramine.chunk.alloc.layout=8)

[optim] Optimized RecipeCache - don't clear full cache on overflow - remove only oldest (by usage) entries

[optim] Optimized RegionFileCache - don't clear full cache on overflow - remove only oldest (by usage) entries ...

Also fixed possible deadlock

Update player chunk send queue on server coord changes (don't await client packet) ...

1. It is an optimization because we don't rebuilding chunk list on each player packet
2. It is an improvement because we don't awaiting client packet on player server coord change (like teleportation)
3. It is a fix because some client mods don't send coord update packet to server before first chu packet handling

[refactoring] Reformatted @InjectService usages

Issue #52 Service-based economy API, economy commands & default currency moved out of the core

Added sync server executor and some utils for CompletableFuture-based commands support ...

- Added sync server executor that executes runnable in it's "execute" method if it is called from main server thread or delegate execution to nextTick otherwise

Issue #49 Added undoable service registration, lazy service provider switching, thread-safe ServiceManager

Added undoable API

Issue #49 ServiceStateHandler

Merge branch 'stable' into master ...

# Conflicts:
# src/main/java/net/minecraft/world/WorldServer.java
# src/main/java/net/minecraft/world/chunk/Chunk.java

Fixed Entity & TileEntity unloading in worlds with 0 active chunks (memory leak on world generation)

Prevent teleportation while riding entity

[optim] Optimized Chunk.scheduleBlockUpdate() ...

- use ShortObjMap with chunk coord keys instead of HashSet<PendingBlockUpdate>
  - deduplicate PendingBlockUpdate by coord
  - pool ShortObjMap and TreeSet objects

Fixed player NBT data read/write out-of-sync ...

In ultramine core player data saves asynchronously, so it was possible to read OLD data after
NEW data requested to save, but has not really been written to the file.

Merge branch 'stable'

[compat] Fixed GalactiGreg ore generation

Merge branch 'stable' ...

# Conflicts:
#	build.gradle

Fixed /custmsg possible client crash

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

[optim] Optimized vanilla leaves decay

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

Fixed strip color sequences from log file

Fixed /killentity

Fixed /vanish lang

Issue #47 Command unregister, fallback prefixes

Issue #50 Permissions moved out of the core

Issue #49 First service architecture draft

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