Fix WorldClient leak (#28)

src/main/scala/codechicken/multipart/MultipartHelper.scala

@@ -41,7 +41,6 @@ object MultipartHelper {
     if (!tag.getString("id").equals("savedMultipart"))
       return null
 
-    MultipartSaveLoad.loadingWorld = world
     return TileMultipart.createFromNBT(tag)
   }
 

src/main/scala/codechicken/multipart/handler/MultipartSaveLoad.scala

@@ -7,16 +7,13 @@ import net.minecraft.world.chunk.Chunk
 import net.minecraft.world.ChunkPosition
 import codechicken.multipart.{MultipartHelper, TileMultipart}
 import codechicken.lib.asm.ObfMapping
-import net.minecraft.world.World
 import scala.collection.mutable
 import codechicken.multipart.MultipartHelper.IPartTileConverter
 import scala.collection.JavaConversions._
 
-/** Hack due to lack of TileEntityLoadEvent in forge
-  */
+/** Hack due to lack of TileEntityLoadEvent in forge */
 object MultipartSaveLoad {
   val converters = mutable.MutableList[IPartTileConverter[_]]()
-  var loadingWorld: World = _
 
   class TileNBTContainer extends TileEntity {
     var tag: NBTTagCompound = _
@@ -59,7 +56,6 @@ object MultipartSaveLoad {
   }
 
   def loadTiles(chunk: Chunk) {
-    loadingWorld = chunk.worldObj
     val iterator = chunk.chunkTileEntityMap
       .asInstanceOf[Map[ChunkPosition, TileEntity]]
       .entrySet