[optim] Optimized memory usage on chunk send

[client] Issue #50 Fixed singleplayer permissions

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 some World methods by using getChunkIfExists instead of chunkExists + getChunkFromChunkCoords

[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

[buildscript] Replace version in annotations (used in mods build)

Disable entity updating in worlds with disabled chunk loaders and no players ...

(previously 'enableChunkLoaders' option was ignored in this context)

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

Prevent teleportation while riding entity

[compat] Fixed EntityLimiter & mob spawn for LycanitesMobs

Fixed kick from server if player with too long username connected

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

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

[optim] Little WorldServer.func_147456_g() optimizations (it is enough hot) ...

- removed unused variables
  - use ThreadLocalRandom instead of default world Random

[optim] Optimized World.getBlockIfExists()

[optim] Fixed Entity with old AI path recounting each tick if target is not reachable

[buildscript] Fixed SpeicialClassTransformTask out-of-date check

[buildscript] Updated Gradle wrapper

[buildscript] Added option compile_incremental to enable incremental java compilation

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.

[optim] Use buffered IO when writing non-compressed NBT to file