Optimized chunk loader
Improved furnaces

* Fixed progress bar on 1.8
* Fixed bugs
* Improved code
* Fixes #1068
* Fixes #1070
Better StreamNextChunk() method
Merge branch 'master' into ChunkLoader
Stream 4 chunks per tick. Added priority.
Corrected IsBlockAttachable() in BlockVine.h
Corrected drops from dead bush, tall grass and cobweb.
Leaves are harvest-able.
Added distance check.
convert old style casts to fix warnings
refactor an if block to std::min
fix std:min call, include algorithm and compare same type
Fixed a number of stylistic issues.
Nullptr?
Simpler code.
InfoDump: Fixed GH permission export, moved output to plugins.
InfoDump: Fixed trailing whitespace.
Furnaces now update their block entity type

Therefore improving cChunk's variable boundary checking.
Fixed failure for cRankManager to restart
Merge pull request #1502 from mc-server/furnaces

Improved furnaces