Issue #673 Fix, Chunkworx now uses QueueUnloadUnusedChunks instead of UnloadUnusedChunks.
Fixed Chunkworx, Issue 673.
Implemented paintings, fixes #689

+ Implemented paintings
Comments & new BLOCK_FACE constants
Merge pull request #695 from narroo/Issue673

ChunkWorx uses QueueUnloadUnusedChunks
Properly exported and documented paintings
Updated Core
Added a bit more documentation to cForEachChunkProvider.
Added cWorld:SetAreaBiome() API function.

Fixes #675.
Debuggers: Added a test for the cWorld:SetAreaBiome() function.
The cuboid for cWorld::SetAreaBiome() doesn't need sorting.
APIDump: Documented missing cWorld functions.
ProtoProxy: ignoring PolarSSL build files.
Merge pull request #696 from mc-server/paintings

Implemented paintings, fixes #689
Merge branch 'master' into itemframes

Conflicts:
	src/Entities/Entity.h
	src/WorldStorage/NBTChunkSerializer.cpp