1.6.0-pre164

Added new system which makes sure that door transition is smooth even though a chunk update is done in the middle of it (was especially a problem for larger doors)
Fixed extracting structure buffers causing incorrect indexes (causing exception and rendering issues)
Fixed section index not getting updated properly during door transition (fixes flicker when door goes over chunk borders)
Fixed appending data to chunk causing issues when not all blocks have added layer
Fixed children doors sometimes not being visible even though they are part of the screen
Fixed not rendering blocks in entity when they have been added to render data once
Fixed crash when using tools and interacting with opened doors